S.S.
Hi L.,
I've found that I'm most successful with these milestones when I just wait until my son is ready. The more I coax, the less he wants to cooperate, but if I leave it alone for a while, he'll come to me one day & be ready for whatever it is. He was a late walker, nursed for 17 months, and just got potty trained & started sleeping in his own bed when he turned 4. All of these things he had to do on his own time, not mine. Then, when he was ready, he did it all at once & never looked back!
Enjoy this time with him. He will grow up before you know it & you'll miss these days together.
Good luck.