Building a pc is dead easy. There have to be tons of YouTube videos. Every part only fits in one spot. The only thing that isn’t as intuitive is the little wires for any front facing usb slots and power lights..basically the case electronics themselves that plug into the motherboard. How you do that is in the manual for the motherboard.

Otherwise just be careful when setting your cpu in place. Once it’s clipped in you’ll not have to be nearly as delicate with the rest of the hardware.