work outs?!

Took a test this past weekend it was + went to dr yesterday for a blood test and was also + our youngest is almost 14months old, i have been trying to loose weight as this baby is a big shock we weren't even going to try till next year sometime wanted to get some of my baby weight gone before hand ( about 30lbs) besides eating as healthy as my body will allow, is their any good exercises that I can do or basically just walking?