The most dificult step is the initial 'talk' explaining to friends and/or family what is going on inside you. Its tought he first few times, but after a while it becomes totally natural.
You will find that peple have a lot of questions and the more open you are, the more they will respect you for it. People often have misconceptions about transgendered people and you may find you need to explain a few essentials as many people cannot tear gender and sexuality apart for starters.
Sometimes it can take a lot of patience, but you will find that the negative attitudes that may initially be present will likely dissolve very quickly the more they understand about you as a person. Most times that I have spoken to people about myself they have been very enthusiastic and wanted to know more and more, even offering their services in various things such as clothes and makeup etc lol, it can be quite fun.
As has been previously mentioned, dont force anything, you will know when you feel sure ennough in yoursel to approach your doc. The more friends you have to support you, the more confident you will feel so I would suggest you speak with them about it before you take it further.
Best of luck, be yourself and they'll love you for it
JJ x