Sister Leyla's advice is very practical. Could you tell me which city you are in? I would recommend very strongly to connect with your MSA (Muslim Student Association, if any, in your University), get involved with your mosque, and if possible, find a Muslim Youth Volunteer Group (they have halaqas/support groups as well).

Wassalam,
sister Saba

I am very happy to help you, however I am not sure what advice it is that you are seeking, so I am guessing now.

There are a lot of us who come from families who are not practising Muslims, and yet it is possible to be a practising Muslim and maintain excellent relationships with the family at the same time. I understand that you have gone through a big change, but do not worry - Muslim sisters are everywhere and I am sure in no time at all you will find yourself in friendships with Muslims in which you can express yourself as a Muslimah.

I am sure that there are communities and people around you, a local mosque, school, or college (depending on your age) where you will soon find Muslims, some from Muslim families, some reverts from non-Muslim families and inshaAllah if you can find these people then you will find yourself in a community of people who will be constant reminder to you of Islam and support you in the deen.

At home, maintain the prayer, read the Quran, and practice peace, love and patience with your new family.

Your step father is mahram to you but your step brother is not, however naturally as you are living under the same roof, your paths will cross and there is no helping that - so do not make yourself unnecessarily uncomfortable about this: its unavoidable and creating a great deal of anxiety around it would be unhealthy.

Peace,

Leyla
Editor, Islamic Answers