There's pros and cons of a big church. Cons is I don't get to know everybody I don't get to go to their ballgame I don't get to marry everybody but the pros are you get all this community 800 ushers come in to serve getting there at 7 in the morning on their day off and coming in on Saturday to make all those wafers.
If you think of exercise as a 60-minute commitment 3 times a week at the gym you're missing the point completely. If you think that going on a diet has something to do with nutrition you don't see the forest through the trees. It is a lifestyle. I know it sounds cliche but you have to find things you love to do.