Obviously, this will require a commitment on the part of the student and family that acquiring a Jewish education is important to you. Now this really should be the first consideration. Well, this is one of those cases where it is OK for your child to think they know more than you do at this point. Your child's religious training will become a religious leaming experience for the entire family. Basic adult education classes are available.
Lecture series are a terrific way to gain knowledge.
Our Temple library holds a wealth of information. Reading along in your child's religious school books will show your child your support and commitment to their efforts and give you basic knowledge as well. I would be happy to teach you how to do this privately. I also have tapes of services, blessings, prayers so you can learn the songs and prayers and become more comfortable at services.