I think what you're doing is a great start. I assume you had the baby through natural means (no c-sections), so my advice would be to do some planks to pull the ab muscles back in - they get stretched during pregnancy. If you had a c-section, I'd wait a bit longer for this one (I had both kids via c-section and planks flat out hurt - even after 2 years). And I'd add squats to refirm the but and thighs.
I think you're off to a really great start. You're certainly doing better than me. All I'm really doing right now is walking.