So this was something I had been planning to do for a long time but never knew how to approach it. My father was always the one in charge of getting new tech for my brother and I but this time I wanted to do it just so I could say it was MINE. I went at it alone except with some suggestions from friends and tutorials online. Friends suggested pcpartpicker and the list grew from there.
I decided id buy all the components on Cyber Monday but i quickly learned that was a bad idea. Like nearly all the major components were already sold out. Like i wanted a Asus Maximus Hero VII, everywhere i looked, was sold out or any orders i made would be put on back order and i'd get the MB when i'm on vacation, as far away as you can be from my current home while still staying in the US. So I ended up using my old computers CD-rom and getting the motherboard im currently using (MSI Gaming 5) from Fry's (who were also out of the Asus MB).
I tried really hard to keep cable management as good as I could possibly get it as a beginner. So this led to me rerouting everything like three to four times to make it fit in the back and be organized. THEN, the motherboard's heat sinks are tall, which i did not anticipate due to just deciding to get to get in on the fly, would block the radiator from being attached to the top of the case properly. So my father and I brain stormed how to place it until we just didn't use the screw holes and used the screw and washers to screw them to the metal mesh and only use three screws. Other then those problems, it was an enjoyable experience.