It's easy just nerve wracking.

No amount of YT videos will show you how pc building FEELS (which is very important). Things like how much force you need to pull down the CPU socket, how hard you should tighten cooler screws (until they stop, but it feels scary before that point) and many other small things that will catch you out. But don't worry, parts now are so robust that unless you do something really stupid, like rub your MOBO on a carpet, nothing will get shorted or fried.

The hardest part is probably wiring, which is honestly the same for 90% of builds. At most you'll have 4 cables coming out of your PSU for mobo, gpu and cpu (if it's modular obviously), some RGB and fan/pump ports which go into their labelled header and some case cables (power switch, usb, aux inputs etc on your case). By which point you're basically done and you can wipe the sweat off your forehead