Losing weight and getting in shape to become more attractive is not against DB philosophy at all. No worries there. You are doing it to be attractive, not just attractive to her though (whether or not you realize it). I would not worry about being "bad at DB". You just got started, so it's actually called a "starting point". Keep working, no one is perfect.

Now get yourself back out in the world and get busy living.

H 34
W 29
BD 3/12/18
Divorce Busted Spring 19

It is not things that bother us, but the stories we tell ourselves about things.