Welcome to SP!
It sounds like you have a lot on your plate.
A little bit of daily exercise is better than none. 10 minutes a day is a good start.
SP has exercise videos here on the site that may be helpful. www.sparkpeople.com/resource/videos.asp
Using the Nutrition and Fitness trackers will help keep you in check.
And being active on your Spark Teams will help keep you accountable and motivated.
Best of luck to you!