Should I Quit football?

I am going to 9th grade after summer break and before school started i was pressured into doing something over the summer. It was almost last minute and the only thing open was football (for the record i know nothing about football). Im not a very healthy/sporty person and my dad said for me to take a huge jump to football (one of the most toughest sports in america) was a bad mistake. But my mom doesn't want me to quit because ive quit so many things. Im not a very committed person i must admit but thats because I never found my true interest. Ive done karate, basketball, soccer, tennis and water polo and quit after 1 year. I dont know what to do. My mom will yell at me forever if i leave and my dad is insisting for me too leave.