back on MFP after baby... and serious this time!

Hi! I know you posted this a month ago, and I hope things are going well! I also was a regualr user of MFP pre-baby and I credit it with me lose nearly 20lbs. With my pregnancy, I gained all of it back (and then some) and now am hoping to lose 40lbs as well. My little guy is now almost 7 months old. After recovering from a c-section and then dealing with kidney issues for 3 months, I'm finally feeling up to exercising, but I'm having a hard time getting started! I feel like I need someone to hold me accountable. My husband and I work opposite schedules and I know I use the baby as an excuse for not exercising, though there is so much I could do with him. I was wondering how you find the time and what type of exercises you do??