Around the house: cooking and meal prep, keeping a clean and neat living space if you don’t already. Basic home and car repairs. All of these will save you money in the long run. On the subject of money, learning to budget and manage your finances is also helpful. I recommend fitness to anyone. If the gym isn’t for you, find a sport you like, or at least go outside for walks.

As for studies, you can start with free online courses in things you think you might be interested in and assessing how you feel about them before going further.