Paddle Boarding

So tomorrow I'm going to try it. I've never done it before. I've spent many years doing watersports: kneeboarding, wakeboarding, waterskiing and innertubing but never paddleboarding. It looks relaxing ... if you have a good center of gravity and balance but I've always been more of a strength type athlete not a flexibility and balance type gal :( so we'll see how this goes. Has anyone ever done it? Have any tips for me?