My wife and I went through a similar situation. We didn't grow up in the NOI but we joined in our late teens. And it can be overwhelming realizing how much there is that you weren't taught and how far from the reality of Islam the teaching you were taught are. Which city are you in? Does the college you go to have a MSA? One of the most beneficial things (knowledge wise) for me was learning as much as you can about Prophet Muhammad :saws: This was one of the best resources for me http://www.islamicbookstore.com/a4749.html . The most important thing (in terms of practice) is your salaat. Do everything you can to pray your salat on time. What resources are you using to learn your salat? As far as the mosque and your family goes, most will not understand and will feel somehow that you betrayed the minister and have become a "hypocrite". Like sister "rahma" mentioned going to a WD masjid may be a good transition point, though I didn't go that route myself. To say your shahadah you simply say la ilaha illa allah muhammad rasul allah. Learn the basic elements of belief to guard your new found faith. This forum is a good resource, especially starting out, with a lot of helpful people, ask any questions you have here and you will tend to get good answers.