My first sourdough free form attempt

Hello,

This is my first post on the forum. I look forward to learning from all you experienced bakers. First Sourdough

I think I under kneaded it to start out with and I am not sure how to really shape the loaf.

Out of the Oven

Not kneading much isn't a big deal, but you need to do something to tighten things up. Take a look at this thread on folding. Do that a couple of times and you'll get something much more loaf-like. Welcome to the site.