Just for the record, you have probably the greatest name ever!.. if that is your real name. My name is Shane too.
What I would suggest is to keep playing the song with your band. Once you get comfortable, start to experiment and just fool around. Try a solo, or just whatever. It may/won't all sound good, but thats what is fun about music, trying new things. Also, if you record your band ever, you can take a recording home and just listen to it. You may hear things you never noticed before, and you might hear things you want to change or add. Just have fun man. There are no strict rules you have to follow, which is what I love so much about writing, and music in general.