Why NOT join? Since you have a knack for it, it can't do any harm. And any "pros" that are in the group aren't any different than YOU are. And besides, did you know that newcomers sometimes TEACH "oldies" ALOT of things? I've found that true in many areas. So don't feel self -conscious just cause you're a "newbie" cause you just might put a spark in some of the old timers and give them some fresh new ideas!
So go ahead and join the group -- and do us a favor? Let us know when your first hit gets on the charts, will ya? We won't have a clue since we don't know your name! LOL

God bless and please take care -- and start writing those songs! Hugs, Lee
PS -- by the way, I love ballads.