Sorry, I have been gone recently! I have been so busy with work. I wanted to first come back and take a minute to answer about exercise.
I think walking is always good. Especially if it's regular. I found the elliptical was also a nice way to get exercise with my daughter. I don't have access to one right now, but if I did, I would be on it in a heartbeat. Other than that, I just do dance. I did dance classes at my gym with my daughter and I just avoided anything high impact (like jumping).
As for strength training, walking lunges and planks are great! I do both regularly. Planks are hard, but they are so good for your core. I will do one and hold it for 30 seconds, rest for a minute. Then I do this up to 3 times. That's my starting point. I do this every other day. I also have a rest day in the week when I don't exercise. So, I have one day for cardio (walking, dancing, or elliptical for 20-30 minutes) and then the next day will be strength training. I usually can work up to holding a plank for a minute after a few weeks. The walking lunges are great for legs. I am working on side lunges this time also. I didn't do them with my daughter, but I have been told they are good.
What to avoid- Anything where you have to lie flat on your back, heavy lifting, and I usually avoid most things that go over the head because of the risk of pulling something with so many loose ligaments.
I hope that helps!