Dude... People will tell you to read the bible or join a church to start. The best advice I got on my path was to start with reading C.S. Lewis "Mere Christianity".

Here's a quote about the book which I liked (because I'm too lazy to do a write up myself =P)

Lewis walks with you through his logical progressions. As a convert himself, self-admittedly one who was outspoken against Christianity, he is intimately familiar with the natural objections that Christians often face at different points in their spiritual lives, whether from internal doubts or external questions. Anticipatory and consistent, Lewis gives comprehensible context and support for many tenants of the faith that, which while they are inherently held to be true, are often difficult to back up. This makes Mere Christianity an especially good read for the college student, I would argue–I find verbally explaining my faith, and the certainty thereof, much easier now.

After that, go and look for a church that fits you best. They can vary greatly... Find a pastor you click with and whom you can ask questions openly to and see how they respond.

Personally I found smaller churches to be more energetic and interesting.