First thing that I would like to say is: you have got to purchase roth IRA when you still can. It saves you tax and trouble after you retire.
Second, Fidelity has lots of good funds. They have friendly advisor to help you as well when need one, and it is not hard to find one and fit into your time schedule.
I have invested in fidelity for over five years now. In general, their funds have good returns (above average).It also has very diversified choices for you to choose from. If you have never invested before, fidelity is the place to start