Hi Toni, lots of people here do Jillian Michaels' 30 day shred. I really like the fitness programs you can follow online - like hasfit, fitnessblender and any other random videos on YouTube (I did lots of tae Bo when I started out!)
For the tummy, just losing fat will help, so keep going with the WW. And core work of course, like planks - they hurt but they're good. Be careful with crunches though, they can make some people's tummies worse, depending on the state of your muscles.
Toni, one of the best things for your belly is walking. Moving your legs stretches and tone the muscles in your tum. It's great for weightloss and overall fitness and can be done anywhere. Try and fit as much walking into your week as you can. Go at a good pace and drink plenty of water. I would go with Newrowsees advice to focus on weightloss and do WW with lots of walking. When you lose more weight you will have more energy to focus on certain parts of the body - but I would have at least one session with a qualified personal trainer to make sure you are doing exercises that are safe and you are doing them correctly. I always found after babies that weight-training machines gave great results, but I didn't have CCs.
Just reread your post and saw you mention walking! It's the simplest ways to get fit and one of the easiest on your body. Let us know how you get on at WW.