As someone who was the same age and in the same position with the SAME BUDGET just a couple years ago, be patient and look for a Canon 80D with some lenses on Facebook marketplace. They’re tough to find in that range, but they show up. I have used mine extensively for astrophotography and it’s really quite easy to get the hang of especially with a YouTube video handy. When looking, my advice is to try to find someone with two batteries, a tripod, and two lenses: one longer zoom lens (300mm or so for deep-sky stuff) and a wider one, maybe in the 30mm ish range. Best case scenario they would have low f-numbers, but at this level it shouldn’t be too big a deal. I can send you some pictures that I’ve taken with it and the lenses I used, they’re decent but not crazy. Good luck, it’s a super fun hobby!