Hang in there. It takes at least 3 months before you start to recover. It's possible to lose weight while you're actively taking monthly shots, I've seen my brother do it. It's rather challenging, but don't worry too much about weight. Focus on getting better. If you're able to post and hang around here, you should be able to pick up hobbies like reading, music, etc. Why not take some time off the forum?
Binaural beats/crystal bowls/meditation were relatively unchanged for me too when I was on the shot.
Marijuana/psychedelics can actually worsen your healing in some cases. In my experience, they were not helpful and just made me sleep for a long time.
Yes, because the trauma of being forcibly medicated adds more negative symptoms to the recovery experience
The half life just tells you when invega leaves your system. It could be a while before you actually feel like yourself due to the time it takes receptors to recover, which doesn't always happen immediately after stopping invega.