Need advice on first time pregnancy

Hello, My wife is 9 weeks pregnant. This is our first one after 3 years of trying. We are excited about it. I need advice on the do’s and don’t on this first trimester. Right now she’s taking multivitamins(includes folic acid) after lunch and prenatal milk(Anmum Materna) after dinner. Is there anymore supplements that she needs to take? During sleep, is it okay to lie on your stomach? Is there any preferred position? As this is our first baby, we are quite lost on what to do. Need some advice on this first trimester. #Needadvice #firsttimemom #firsttimedad