The little Voice in my Head is Starting to Win

I am starting to have some doubts in myself. Not in my abilities, as those are still improving more often than not. My doubts are in my resolve to finish this. I was an average athletes in high school because once the season was over, so was I. The equipment for whatever sport it was went to the back of the closet. I would have thoughts that I should keep on working out and just never had the follow through to start and complete workouts. Come time for try outs and I was the kid with some potential but had to fight to get back into shape. My post season starts in less than two weeks and I am worried about this cycle happening again, except this time there is no get back into shape in the first couple of weeks into the season. I HAVE to be in shape and ready to race as soon as the water temp is high enough or I will not meet all my goals. I know doubt is something we all have and I have taken the step to get my team together so I have support there to nudge me when I need it. I am also planning to join an actual tri team so there are extra coaches and team members to help, but I wish I could get this voice in my head to just shut up.