You don't have to go into detail if you don't want to. If you must go into detail you can use nicknames like "privates"
I don't think you should talk about it unless you are comfortable. Unless if course it's for court. If it's therapy then you can say you aren't ready. You will know when you are ready. You are not expected to tell anyone else, especially not in detail. If it's a friend, you can just generalize it by saying you were sexually abused. You have every right to say "it's too personal or traumatic to talk about right now"