Nice looking bike! I'm new to road biking and I find that my shoulders/neck get a little sore. I'm not used to the posture yet and my muscles aren't quite strong enough to support that posture for very long. I'm sure it will come with time...
I know what you mean about no one watching with the clipless pedals. When I got my bike the bike shop installed the pedals before I picked it up and the owner made me practice, for the first time, in the shop, with him holding the bike steady for me, and with other people around! It was embarrassing and I had the hardest time at first because the feeling was just so foreign to me!
Once I got home and practiced on the trainer, it was way easier...
I haven't researched bike computers because I'm not experienced enough to make use of most of the features yet. I did buy a basic one from the shop though, so I can keep track of my speed/total mileage. The Garmin Edge computers seem to be pretty good, but are too pricey for me.