You are not able to make any decisions about yourself for now because you are still under her roof. But that is only temporary, like everything else on this earth. You may not appreciate it right now, but try to think in the long term and know that some day, you will be able to take whatever decision you want to (just like I decided to start drinking when my parents didn’t allow me to..!).
As of you disagreeing with lifestyle choices and beliefs, well that is how life is. But what is there for you to do? Nothing. I do not want to sound rude, but you need to try and stop focusing on everything you dislike about this situation.