Good for you that you've made up your mind to turn this around and get back into shape. The time crunch will be harder, but since you know about anatomy from weight lifting maybe you can be creative and make up some exercise play time with your baby. He'll probably love to be lifted up or have you bend over him while he's laying on the floor as you stretch your hams, etc. Even though it might take longer, I bet you can come up with a whole routine. Plus, he'll know how important and fun it is to exercise growing up watching you workout.
Good luck with getting back on track - and good for you for your decision.