While its ok...there is some unclarity I think....You might be saying that because you only learned about Islam, there is a gap in your knowledge which limited you in some way. You might be saying that someone or circumstances set this limit on you. In either case, you might be saying that Islam is the only religion that you learned about; but the "and nothing else" could also indicate that you had no other studies at all....no maths, art, languages....nothing.