Getting away from a controlling relationship and having a chance to start over with family nearby who would like you there? Sounds like a good idea.

On the transition doctor-wise... See if your current doc will write out prescriptions for a longer time span than usual (most stuff you can fill a 2 or even 3 month quantity). Which of course would also depend on your meds and history if that is safe to do. Even if that is not an option, at least be sure that all your rx's are current and have refills left on them. It's a load off your mind to not worry about running out of meds while you are getting set up there.
When you get there, check in with the local NAMI. It's a quick way to get a list of local psych resources.
(It was also interesting to read your situation because I am also soon to make a 3,000 mile move (and away from BF, though our relationship is fine... long story) and have never lived alone and am quite apprehensive about that. The rest is the reverse of yours -- away from family (but back to
home if that makes sense) and back to support system/psych. Anyhow!)