What’s the best build I could get for like $1200-1500. Would I be able to get a 30 series card and still be chillin with the rest of the setup
Not a 30 series card these days, not unless you want to be on a waiting list for many months.
Not sure about what you can get in the US, but for about £1200 GBP recently I built this for my nephew:
2080ti (second hand we can get deals for like 400-500
R9 5900x (new) £420 (on sale new) - Stock cooler initially, now they put a aio in it
1000w corsair psu £150
16GB Corsair RAM £100
Case I already had, worth about 90
Some drives I had laying around, probably worth like 200. Couple SSD's for boot and games + a HDD
MSI WiFi Motherboard around £180
Would be a bit over your budget but its for editing and gaming, you should drop down to a 5700x but even then a 3700x would work basically the same and would save you loads.
If you need help, I helped Wastee build a pc which he hasn't had an issue with from when I last spoke to him, drop me a message I don't mind.