What is the BEST possible PC build I can make?

I'm sort of new at PC specs and terminology and I'm realizing that upgrading my current PC isn't worth the money if I can just get a new modern one.

I currently have a asustek computer inc prime b450m-a motherboard with a Nvidia RTX 3060 Ti GPU, 32 Gigs of ram, and a really crappy CPU (AMD Ryzen 5 2600 six core processor). This PC cannot handle streaming from OBS while playing minecraft. I only have 2 fans here and I fear my case has bad airflow as well. It was a gift given to me by a content creation friend and I wanna take this seriously seeing as this is my dream. What motherboard, GPU, AIO coolers, SSD, Case, CPU, and any other combination of parts give me the performance I need to stream and play games in high quality? I'm willing to spend up to approximately $2,500.