I an elective c-section when my DS was 21 months. My husband was lucky enough to have 3 weeks off during that time (although I spent 5 days of that in hospital) and while he was off I got him to do most of the lifting of DS at that time.
Once DH was back at work I made things easier by changing DS nappy on the floor and having DS in a bed was easier as he could climb into bed and go to sleep or he would nap in his little fold out lounge which we picked up at Kmart for about $5 or $10. I also found helpful was showing DS how to safely climb in and out of his car seat as I found that I was still a little bit tender after the 6 weeks, and DS was 11 and bit kilos.
But it is also about knowing your limits, having common sense and not pushing yourself.
I hope this helps. If I think of anything else I will come back and post.