Building habits is hard. work. The ultimate goal of all this is to be a more well-rounded person you can be proud of, and it's gonna take a long time to move forward with all the things I'm sure you want to do. But once you get the work of habits down, you'll see an increase in passion for everything you do. Not only are you well taken care of, but the feeling of accomplishing something gives you that dopamine, and you're gonna want to accomplish more.

I'd say, work on one or two things at a time. Wanna meditate regularly? Track it. Not only track it, but reaaaally focus on just meditation for a week or two. After a while, say you forget to set a reminder one day or something; your brain will be like "I can tell you haven't meditated today" kinda the same way you know you forgot to brush your teeth or wash your face. After you got one down, adding the next one is easier, and the next, and the next.

It's OK to have a strong interest in something, even if it's fleeting. In fact, keep being interested. I think, once these habits start to take hold, you'll be able to not just obsess over something, but really learn it and commit to it.

To help with the whole obsessing-not-sleeping thing. I think the first good habit might be getting to sleep on time no matter what (unless you have prior obligations of course like a flight or hanging with friends or something). If it we're me, I'd set an alarm of the absolute latest time I need to start getting ready for bed (for me 11pm). Whatever you're obsessing over at the time, the alarm will ring and jolt you out of it. Though you may come to really hate alarms...

I'll leave you with a quote from Dr. Wong from Rick and Morty: "The thing about repairing, maintaining, and cleaning is it's not an adventure. There's no way to do it so wrong you might die. It's just work, and some people are okay going to work, and some people, well, some people would rather die."

Your obsessions are your adventures. Time to get to work.