RE: Help me decide if I need an instructor
Just choose a very calm wind day and gofferit.
Like said, have an experienced pilot beside you. Don't try to land on the first pass; practice approaches several times, getting lower and in line with each pass. Then when you feel comfortable, go ahead and let it settle in.
I was in your position several years ago and bought a HobbiStar 60 to get the feel back.