Personally I wouldn't try hiding who I am but it really does vary from person to person.
You can either tell your parents and explain that this is who you are and that you wish for them to understand and accept you as such. Tell them that you accept them for who they are and love them. Ask them that they be tolerant of you.
It is not hard to hide who you are(Though I do not agree with hiding.) Simply don't draw attention to what your religion or what you practice.
I do understand that some people have to hide from fear. Whatever you choose will be up to you and I wish you the best of luck.