Another vote for flogging it. It's a very nice frame and, although I've no idea of you abilities with a spanner/torque wrench etc., I wouldn't advise using it for a first build (if it goes wrong with carbon, it can be curtains for the frame). As you wrote, everyone has to start somewhere, I started with a 20 quid bmx when I was 10 - I knacked it by being hamfisted and not really knowing what went where and how tight it should be. I can live with myself knowing that I wasted 20 quid, but if I buggered up a lovely carbon frame, that's a different story. As you can't stretch to an electronic groupset, I doubt you could afford to ruin the frame...
I think you've been offered some good advice by the others if you were to go ahead with the build, particularly relating to help from your local bike shop. Perhaps you could get your new components from there (asking for a discount of course...

). If you are set on the self build, perhaps post here before purchasing new parts to make sure they fit the frame.
Good luck.