Do you have to be really athletic to compete in a local flag football league?

My city has this flag football leauge every year for $300. I wanted to do it to get out of the house and be more active in my community...im not un-athletic and i go to the gym several times a week and I'm strong..but if I drop pes will i get benched and have teammates threaten my life for losing the game winning touchdown p? or are these for amateurs who never really played football just looking to have fun..i dont wanna ruin a teams chances..i just wanna have fun..and i think i have atleast some things to offer to a team...has anyone ever played in local government sponsored sports? what was it like?