Ah, this is a fairly difficult situation. Is your father part of a religion, and if so, how heavy/into it is he? And does he have much interest in actual science?
Depending on the answer on those, if you were still wanting to come out, it may be easier or more difficult. If he's understanding of science, or isn't very 'radical' or 'hardcore' into religious beliefs, convincing him may become easier. However, if he was into a hard religious belief, getting a clear understanding may become... Extremely inconvenient.
If possible, if you were to come out to him, have another family member or a close, family friend with you t the time. If you have one of those who accept and support you as you are, it is much easier emotionally, and argument wise, to have someone with you, instead of doing it alone.
Wish you luck.
