https://www.walmart.com/ip/Unique-Bargains-Side-Slant-Edge-Manicure-Tool-Finger-Toe-Nail-Clipper-Cutter-Scissor-Trimmer-6cm/179519146
most drugstores, walmart, even grocery stores should have side slanted clippers. Ebay has them cheaper but ship from hongkong so it takes longer.
Gliders will not bleed out, even if you cut all their nails to short. The bleeding stops very quickly and while not pleasant for the glider, it's usually more traumatizing to the human. The only time I cut to close I cried over it for 2 days n my glider never fussed at all.
In fact, they don't even bleed enough to get enough blood to run a blood test from what I've been told. They will bleed a drop or two, but you can can dab cornstarch or all purpose baking flour on the nail to stop it quicker.
You don't have to be able to hold the gliders to trim nails, Just gotta hold a foot.
do it where there is good lighting, or get a LED light you don't have to hold.
If you can't see the quick, get some reading glasses or magnifying glasses.
Be calm. Be confident.