Mental disability

Q: I would like to say first that I have a mental disability with schizo affective disorder and I have ocd and slip personality disorder. I have a difficult time doing mentally "knowing Allah is doing everything, controlling everything, saying insha Allah all the time, and using my body, and using the "means", and having correct intentions. Its very hard for me to do this. Do you have any suggestions on how to make this easier? Doing basic things are ultimately failing and I have no idea how to do this well. Forgive me for everything.

Attending Hindu festivals

Q: I am a converted Muslim. My parents are Hindu. I face problems from my family's side whenever a festival comes. I want to know that up to what extent I can cooperate with them being a Muslim? On rakshabandhan can I tie rakhi and tilak for my brother?