I’m not a medical doctor, nor am I in your exact situation, but I do know a little bit about sleep. There’s a broad category of things known as sleep hygiene that are basically supposed to be the “best practices” around sleep. Evidence is good for some things, and inconclusive for others, but in lieu of going to an actual sleep specialist, these sorts of things shouldn’t hurt to try.

Stuff like only being in bed to sleep (no watching TV from bed, etc.), avoiding alcohol and caffeine, and giving consideration to your circadian rythym (low blue light prior to sleep, coupled with increased blue light upon waking, it’s apparently the contrast that matters more than the actual amounts).

There’s also plenty of people who have undiagnosed issues affecting sleep. Obviously you said, for you, it’s depression, but that doesn’t mean there couldn’t be something else at play that could be addressed. If you have the means, something like a smartwatch or an oura ring (which is hsa/fsa eligible if you are in the US) could help tell you if you are moving around a lot in your sleep, or could have something like apnea. Again, not the same as going to an expert, but that’s not an option for everyone.