Awesome

sounds like he likes it and has deemed it a safe spot.
Tent time... you may get different opinions on when to do tent time as it varies for everyone depending on their lifestyle and their gliders.
For me, everything I do with my gliders out of the cage is done during the day time, for a few reasons.
They are more docile, slower, and in most cases easier to handle. It's usually easier to get them back in a pouch and back in the cage also.
Night time at my house, is their free time. Once I put their food in the cage between 8 n 9pm, the gliders I have out go back in the cage and I'm done getting them out for any kind of bonding time. It's their down time, their time to eat, run on the wheel, groom, nap, etc... all their favorite stuff is in the cage... I don't like to interfere with any of that.
I typically only use a tent for gliders that aren't familiar with me and were trimming nails and developing our routine, once the glider is used to me, the routine and is no longer a flight risk and stays on me the majority of the time I no longer use a tent.
When I'm working with a new glider ( at any age ) I usually get them out of the cage around 10 or 11 am, I just take their sleep pouch out with them in it.
Once in the tent I sit in my lap and give them a treat, trim nails n check them over... once all nails are trimmed I just roll the pouch down, push the bottom of the pouch up so the gliders are right at the top and want to come out because they are already exposed. Then usually they are either off and running or trying to get back in the pouch.
For the first few times I don't let them back in the pouch, I tuck it under one of my legs, so they can smell it on me but not have access to it.
Keep in mind the whole point of tent time is to get them used to coming to you, checking you out, getting used to how you move and smell and sound and eventually staying on you all on their own terms. So keeping their sleep pouch on you, in your clothes, or under a leg will help draw them to you.
Besides the nail trimmings I don't initiate interactions with them, I watch tv or do something online and ignore them for the most part UNLESS they come to me, if they come to me or on me that is when I pay attention to them, talk to them, pet them, offer them my sleeve etc... if they leave me I go back to ignoring them.
It's important to note, my house is pretty dark even during the day time, limit bright lights when you have them out of the cage or they won't be very active and will seek out the darkest place to hang out and avoid you.
It's also important to note, a tent session for me is usually about a half hour long, at that point they are tired out, had snacks n ready to go back to sleep. I do not force them to stay up during the day, when they are ready they get their pouch back.
If it seemed to stress the gliders, they go back to the cage to destress where they feel most comfortable. If they didn't get stressed they may stay either in my lap or in my shirt for the rest of the day while they sleep. It depends on the gliders...
If you have trouble collecting them to go back to the cage.... get the sleep pouch ready, turn on a light and offer them the pouch. Most often they will voluntarily go in the pouch without you chasing them. Just hold the pouch close to them and let them go in. This is a greatttttt thing to get in the habit of doing, if you ever have a glider get out of the cage, and you WILL, it's easiest and less stressful to them and you if they are in the routine of going in the sleep pouch when it's offered. The sleep pouch should be their 1 safety spot, use it as a tool.
Once the gliders I'm working with are more interested in me than running around, I spend a few more days in the tent with the gliders in their sleep pouch in my lap. They have the option to run around, but most don't. At that point I work on offering them my sleeve. I wear a long sleeve shirt or sweatshirt with the cuff a bit loose so they can see the opening. I make a fist, and put the bottom of the cuff in their pouch and usually they will go up in it on their own. Once the first one does usually the 2nd will follow even if he/she didn't think they wanted to.
Once they go in my sleeve, or stay on me completely I'm done with the tent and it's served it's purpose for me.
I don't bring any glider toys in the tent, to me it's just a distraction for them and it's counter productive to what I'm working towards.
Other people set their tents up like a giant cage, with toys and wheels and all kinds of stuff.. which isn't really wrong if they are just giving the gliders a bigger play space where they can play with them.
As I said, I do tent time during the day, your schedule may not allow that, just do it as early as you can, it doesn't have to be during the day, but at night it may be harder for you to collect the glider and get it back to it's cage. The glider will be WIDE awake and may not be so eager to voluntarily go back in it's pouch even if a light is turned on.
You've had him for about 3 weeks now is a perfect time to start tent time with him.
Since you're already spending a half hour or so with him in the morning that could be a great time to do tent time because he will be ready to go to bed and would probably easily go in the pouch since that is already getting tired and his routine to go to bed at that time . But if you have to leave for work give yourself a few min extra in case it takes longer to get him in the pouch so your not late to work...
How old is he?
is he neutered or intact?
both could have a little to do with nibbling or biting is why I'm asking and should have asked before.