Welcome to Susan's Place. Where you start is up to you because there are so many places to start. The first thing would be to find a good gender therapist and that would take you to HRT if you desire it. On your own, you could start beard removal, makeup, growing your hair out, voice work and learning about everything you ever wanted to know on this site. We have about 10 years of posting history for you to learn from. Feel free to ask questions on this thread and I will be happy to help you.
We are all scared at first and that's why most of us take a long time coming out but you are among friends on this site and we are more than happy to help you.