How do I tell my parents, PLEASE HELP ME!!!!!!?

Well, I'm just about to start my 7th grade year. In preschool and in kinder garden I went to a private school that practiced to religion Pentecostal. I loved it, felt like I would be forgave for all of my sins, I felt good about myself, and I was so into practicing the religion, I hardly EVER got into trouble. Well before I started 1st grade, my parents pulled me out, and then put me into a public school because of the cost. Well, I was the only pentecostal in my family, and now there is none. Well, now I want to go back to the religion, and, well I don't know how to tell them! My mom got remarried, and he's, well, "emo". My mom isn't the most religious person in the world. I live with my dad and he's DEFINITELY not religious. He believes in God but that's it. I haven't even PRAYED since kinder garden, and I'm completely guilty of that, but I'm afraid they'll make fun of me. Please help! I just need to know by June 23rd, because that's the day before we start finding school chlothing and supplies. Thank you and god bless you all! :)