My tips honestly would be, watch loads of gaming pc build guides and pc and tech YouTube videos. It really helps. I knew barely anything about PCs and after just over a month of watching PC YouTube videos, I would know how to build a pc probably with no or little help.
Also when spending $4000 on building 1 PC be REALLY sure that you want to do this, because if you buy all the parts and go off the idea that’s a massive waste of money
Hope this helped, all the best and hope your build goes well