L.M.
I recommend getting a journal and taking a couple of hours to browse the grocery store. Read lables on everything you would normally buy and write down anything that has gluten. Then look for substitutes. Like if you would normally buy spaggetti, if your store carries rice noodles or quinoa, write that down. Corn tortillas instead of flour.... You're making your future shopping lists. When I was gluten free, I tried to stick to things that are naturally gluten free rather than shopping exclusively in the special diet section (which can get expensive.)
It's pretty rough to get started, but then it's pretty simple. Just *read lables*! You'd be surprised how many things hide gluten in their ingredients. Good luck to you.