I would definately direct you to our build a PC thread, they can help you out there.
Complete Build Guide for beginners CPUs Intel Core i5 13600K AMD Ryzen 7600X Intel 13th Gen and Ryzen 7000 offer similar gaming performance in most realistic scenarios, Intel 13th Gen offers notably better productivity performance in the midrange (i5-i7). The battle for the best gaming CPU...
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Ive built/upgraded probably 6 PCs in the last 11 years since I got back into PC gaming. I always go air cooled because its just easier for me. Some people swear by water cooling.
Intel vs AMD i think is overblown. Both have good CPUs that will play your games at incredible settings and allow you to run all sorts of programs on your PC. I would just learn a bit about things like TDP, cores, threads, speeds, motherboard compatibility and look at prices.
Ultimately after learning about how to make a PC the best thing is to make a budget and just start picking stuff to get within that budget.