I lost mine by carrying my son in a sling. I started with a few minutes every day and ramped it up gradually. Honestly, it’s better than any gym, and free. As he got heavier I lost more weight. I gave up at a year because he was so heavy, but I’d lost my weight and I had toned tummy muscles that I didn’t have before. My son loved it.
If your C-section is properly healed you could give that a go, and it suits lockdown and your daily exercise.