Here is a deal on pre-built systems for you: https://deals.dell.com/en-us/member/productdetail/e9yf

If you go the pre-built route, buy the basic system with no options, then buy your memory and storage upgrades from Amazon or New Egg.  You can build/upgrade your present machine, but that would involve new processor, motherboard, ram, cooling system, and possibly the power supply.  That adds up fast, but the AMD CPUS are very attractively priced right now.  I would go with an AMD CPU, because of they draw less power and generate less heat compared to their Intel counterparts.

Look for an NVIDIA card with at least 10-12GB Vram, RTX3060 or higher.