Tell me: How long does it take to put a modern PC together? What sorts of things go into this process?
Depends on your level of expertise; some people it takes only an hour, others a few hours or more if you're new
It's stupid easy as well along with tons of Guides (Paul's Hardware, Bitwit, Linus Tech Tips, JayzTwoCents, and Austin Evans all have great guides) to help
Put the CPU in the socket on the motherboard, then mount the Cooler (use thermal paste before hand if it needs it, though many Coolers come with some pre-applied already but many prefer to use better stuff like Kryonaut), put the RAM sticks in their designated slots (typically 1st and 3rd slots, or 2nd and 4th slots if the motherboard has room for 4 sticks, otherwise just the lone 2), then you stick the Power Supply and any Storage Drives in the Case, mount them, mount the Motherboard into the Case, Install the GPU, hook everything up to the Power Supply whilst doing Cable Management, turn on the power supply, turn on the PC, install your desired OS via USB (typically Windows or Linux, though most will also Dual-Boot MacOS alongside Windows in the case of a Hackintosh)
And all you need during the whole thing is a Phillips screw driver and Anti-static wrist band, though a good alternative is to just keep the power supply turned off and plugged into a Grounded outlet, touching it every once in a while if needed