Begonia seeds

I notice this year my tuberous begonias are setting seed pods, I am thinking of trying to grow some. Anyone tried it I would be really interested in how you went about it.
This one is a single white but both the double orange and red have them too

Friday night Maddy and Molly had a bit of a scrap I grabbed Molly Paula grabbed Maddy we got them apart but I fell backwards and landed heavily on my bum, and by golly did it hurt, it's getting better but I have to be careful how I sit down and go up steps.