My interests don’t really involve any sort of skill or finished products or anything, unless one wants to call the ability to ramble on for hours and/or make everything pertain in some way to that interest a skill Things like one specific movie or one specific band, where there isn’t really anything to measure talent, skill, or quality. I guess maybe Pokemon battles would count, but I’m not particularly good at those besides knowing all the type matchups. My interest is in filling the Pokedex, I don’t pay much attention to stats and stuff.
On occasion I spend hours searching the Internet for every trace of information I can find on whichever interest is my main one at the time. I naturally hyperfocus when that happens, but I don’t need any sort of effort besides being interested in it. I don’t know that that’s really the sort of “studying” you’re wondering about, but it’s as close as I really get.
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Yet in my new wildness and freedom I almost welcome the bitterness of alienage. For although nepenthe has calmed me, I know always that I am an outsider; a stranger in this century and among those who are still men.
-H. P. Lovecraft, "The Outsider"