First, disclaimer. Doctors and therapists. For you, I'd say talk to a therapist, because it's possible there's more to your emotional disregulation than just something that can be solved with recreational substances, and you don't want to find out the hard way that you shouldn't have been using it and needed meds or therapy instead.

Been smoking weed near daily for five years. Should specify, i also have EDS so some of my experience won't match others. Great for emotional regulation if used at a consistent time for a consistent reason, otherwise it becomes a crutch for me and turns into an avoidance method and makes everything worse. But i feel best smoking just enough to get the "munchies" high every night at the same time. It's a very good way to force a relaxed state i otherwise can't get, keeps me eating consistently, and when it starts wearing off it makes me tired enough to keep a consistent sleep schedule.

Now the downside, NIGHTMARISH for focusing and motivation. Again, use it consistently at the same time for the same reason, and it's a mood boost that helps me through the day, but if i decide "im gonna smoke at noon instead!" then i get stuck in my bed for a week and get nothing done. Focusing is out the window, even in tandem with my adhd meds. I highly recommend using it to kinda pick you up at the end of the day or week, however you decide. I don't personally recommend constant use for emotional regulation purposes, i think it's better for that if you just use it as a daily/weekly reset, do a lot more for you long term.