You'll learn real quick if you need to eat more (if it were me, I'd need more food).
Doing 50 miles day in day out will result in a phenomenal base. Combined with some faster riding on the weekends, some judicious days off, and you'll be flying in a few months.
A local guy's car broke down a few years ago. He decided to ride to/from work instead of fixing the car. 40 miles each way. It was October (in CT). He invested in lights, a lot of cold weather gear, and commuted through the winter, even riding to/from a team meeting that ended at 9 PM (and was an hour+ ride from home). He was untouchable in the March races, upgraded to Cat 2 in a few weeks.