Bouncing back from a broken foot?

I'll keep this short, just looking for some insight from other peeps who've had my problem.

I broke my 5th metatarsal in my right foot (outside bone on my right foot) on March 12th, doctor said it'll be about 6-8 weeks until it's healed. After 4 weeks, he said progress is coming along perfectly judging by the x-rays. I go back May 2nd and I should be out of my cast/boot and off my crutches. Hopefully it'll be up to par by then and I can be active because I can't even drive a car (I could, but doc says better not) and it's driving me crazy!

The season is here and I'm a fish out of water... Can anyone with a similar incident chime in on how long it was until they were back on the water? I don't want to push it, and re injure my foot. The muscle in my right leg has atrophied remarkably in comparison to the other. Are there any exercises you can recommend for rehabbing this guy? Anything I can do now?

I need activity in my life!