I built my first (well first for 20 or so years) in 2016 and it was a surprisingly pain free experience, between online advice and manuals that weren't awful like in the old days it felt like there was plenty of help to be had.
I started building it on a Sunday morning and didn't expect to have it done that day but was actually complete by mid-afternoon to the point where I could boot it [and then literally squeal like a little girl when actual bios stuff appeared on screen!].
Do you know what, I think installing Windows took longer and was more stressful than building the computer itself!!
Some areas I had issues with:
- Getting the right specs in the first place, stuff like making sure your motherboard supports the CPU you want and that the power supply you buy is safe/good and will support your components plus some overhead for future upgrades. PC part picker was useful here as well as old PC heads who have done this before.
- Building inside or outside the case. I went for building everything outside the case to make sure it worked as I was convinced I'd have to take something apart that I'd done wrong. Recently though I added some RAM and it was fine doing this without pulling the whole MB out so this might be a wash.
- Working out the amount of paste to put on the CPU. Not too much, not too little. Some kind of Goldilocks BS!
- I was surprised by the force needed on the clips that push the CPU down/secure the heat sink.
- I didn't initially know which two RAM slots of four to use.
- The cables for the PSU were labelled well but had a couple of configurations due to the different number of pins different GPUs have. The manual got me close but I was nervous enough here to seek advice online.
- Getting everything to fit nicely in the case was a bit of a pain and though there's a surprising amount of flex in a motherboard it's not enough to make it comfortable to fiddle around too much!
- Installing the case fans so they blew the right way!
Honestly,
Thewonandonly, I wouldn't recommend it to everyone but if you have even a little bit of smarts and are happy to take your time to do the research up front you'll be absolutely fine. Beside, even if you need to ask what might feel like silly questions there are a ton of people out there more than willing to help (and one or two who will patronise you but those kind of folk exist everywhere so fuck 'em).
I can only speak for myself but I was very pleased with myself after I'd done it, in fact I was quite proud but I really am an idiot so take from that what you will.
Good luck and enjoy whatever you end up doing.