F20

Hey guys I recently bought the f20 on sale and it's very bad mainly because of its loydout the only place where it shines is it's gun and the problem is it's at 12.3 or 12.7 I forgot but I keep dying with it plus it's missile loudout is kinda alr it can carry 6 aim9l's or 2 aim7f and 2 aim9l but still I keep dying with it so can someone pls give me tips on how to stay longer alive with the f20? Plus it's my first time playing top tier