Hey,
First of all, congratulation on taking this first step. I know simply talking to others about this can be very challenging and scary, so you have already made some good progress by just doing that.
I can completely relate to having fear about coming out. I am out to a few friends, a support group, and this wonderful forum. Yet, I am scared about confronting my family. Transitioning is difficult in some many ways. It's not an easy move or something for the weak. You will have to make sacrifices and confront dilemmas that you hoped could be avoided. But, if you feel that transitioning is worth all the hassle that it can bring, than you have to move forward. I am learning on doing this and will not let anything stop me. You can do this as well if you have faith in yourself.
You say that your mom knows. Is she accepting? If so, you already have won the support of an important member of your family. That's great. In time, maybe the other members of your family will react just as well. As for your neighborhood, don't worry about others. You have to live for yourself. If you really don't feel safe or comfortable, you could always try to relocate.
Don't worry so much and just take the steps you feel comfortable with. I would suggest talking about this with a trained therapist so you can discover what your path is and how you should go about traveling down it. Good luck.
Welcome to the forum