I think you should go, take notes of the sermon and when you get home do your own research on what was taught. Most the time you will find many contradictions on what your preachers says vs. what the bible says. If you find the contradictions point them out to your mom and ask her opinion, if you find no contradictions then you belong to a good bible based church and should go as often as possible, regardless of your religious beliefs now or when you get older, you might find the study of theology vary interesting.