I personally use the stealth freedom wheel since it's considered safe and ships through Amazon for hassle-free shipping and returns, if necessary. They're like $50US so not cheap, I can understand not wanting to spend that, especially for something your glider won't even use. (Luckily mine are wheel maniacs and use it every night).
As for pouches and cage furnishings, fleece, especially anti-pill fleece, is generally considered the safest. Items made with fleece and hidden seams are your best choices, you can make them yourself if you've got a sewing machine and some patience, or find vendors who make such things. If she's a chewer you might be better off just cutting some fleece into blankets for her and stuffing them into coconut houses for her hidey holes, that way she has less to get caught on.
Nail trimming happens whenever they start to leave scratches on me, so about every 2 weeks or so. It can be a pain but is necessary, since otherwise they get caught on stuff and scratch you.
Mine LOVE plastic drinking straws and feathers, you can find a lot of fun things for them to play with at the dollar store, there are a lot of examples online. The funnest thing for them seems to be playing with each other and me, though. So a friend and bonding with her more are just as important.
Mine nibble and chomp more when they are hungry, even when I don't smell like food, so maybe feeding her a snack before handling would help.
A neutered male or another female would make a good cagemate for her as far as I know, it depends on their individual personalities as much as their sexes.