One thing that doesn't get enough attention is trying on different weights before you commit. A lot of beginners grab 12 oz because it's common, but if you've got smaller hands or you're still building conditioning, 10 oz or even 8 oz for pad work might actually be better to start with. Heavier gloves feel like they're "more serious," but they also tire you out faster and can strain your shoulders if your form isn't locked in yet. Most gyms have a few pairs lying around - worth asking if you can test different weights during a session before dropping cash.
Once you know what weight works, aim for brands in that sweet spot where you're paying maybe $50-80 for a solid beginner pair. You get actual padding that won't compress into nothing after a month, and the closures actually stay tight. Ignore the reviews count - go for gear that's been around a while and shows up in multiple gym recommendation lists instead. Your hands and wrists will thank you way more than your wallet will hurt.