I will 100% have questions, this is going to be my first mac computer and my first time doing upgrades to a system, i'm a total noob but I usually catch on pretty fast.
That sounds scary... First time Mac user and first time upgrades
It is one thing to do experiments with peripherals, but if you are going to pull the mini apart to do SDD upgrades etc then do a lot of research on watching vids and close-up pics. It is easy, but many still rip off parts here and there.
Good luck and welcome to the world of Mac computers.