PE gcse, should i go ahead with it?

heyyy.. so im year 9 and chose my options a couple months ago but recently swapped one for p.e cos i chose food and cant cook.. anyways, i have no idea what it actually includes? all ive heard is the thing about choosing 4 subject areas.. id do gymnastics swimming life guarding and badminton but apart from this i dont know what to expect, all ive heard is it is 60% practical on your final grade.. anyone with experiences or what not would be sooo helpful! also, i want to do radiology so will p.e be any use to me or can you reccomend a subject that will be? i've got science covered cos im taking tripple.. THANKS:D