If you are convinced that you have to do something now before gaining fitness, flexibility, strength and bike proofing your butt, in order to be able to ride in order to gain fitness, etc...

I would suggest getting the hybrid instead of cannibalizing the Felt.

Odds are, after a few months to a year when you have achieved your goal of "improved fitness and health", you may end up back on the Felt.

Either way, get out there and ride. Lots of this stuff becomes much clearer once you have some miles and experience.