Honestly, start small with a pizza and a 6-pack of your favorite beverage and spend some time reading about your areas of interest on the forum and you'll be getting off to a great start.
Other than that, your experience will tell you what you really need.
Get in and go do the things you dreamed of! (within reason)
I and many others started with creature comfort/protection stuff like good floor mats (if you wheel you will be getting back in dirty) or a set of speakers for the soundbar, that kind of thing.
Avoid frustration and plan what you are doing when you can as much as you can.
Sorry, other guys will throw hardware lists at you. I'm not that guy.