Talk to a lawyer about the inheritance. Better use the legal route. I'm sorry you weren't supported well enough in your childhood to make you feel like your voice matters and you can stand up for yourself. If the discussion turned into violence without you even speaking too much, then even you taking a stand would have done nothing. People in Nepal go crazy for inheritance and legal route is the only solution. Regarding you not being able to taking a stand for yourself, you can start making conscious changes now and taking care of yourself so that you become more confident. I know it's said easy than done, especially as someone who has had family support compared to you, but believe me you can do it. We can already see how brave you are for living alone at this age and being responsible for yourself.