I'm sorry, but if you are a terrible mechanic and don't know BB terminology you may have just begun a headache in buying a new frame. There are many compatibility issues to consider when purchasing or moving components, and building a bike from the frame up is something I would recommend only for someone who has very specific needs (gained from riding, not from reading magazines) access to wholesale parts prices, or who is more concerned about bragging rights than performance. If you can afford a Cervelo P2 I would recommend hiring a shop to consult with you on the best bike for whatever purpose you intend, substituting some parts as needed.