Holy shit, my brain is melting... Full node setup

Just trying to figure out how to run a full node. I grew up playing outside, which included hitting my head on stuff regularly, so when people say stuff like "Just buy a used thinclient, add some ram and a 1tb nvme" I have no fucking clue what they're talking about. I'm just trying to invest in and support the network, but christ is there anyone that can just tell a dumbass like me what to do using dumbass people words?