When should I start dating again???

My ex and I have been broken up since January. When we broke up I was 3mths pregnant... Now that I had my LO who's 4mths old now, I'm interested in dating, but I've never dated anyone with such a young baby, and I'm nursing. I would like to move on with my life, since he's moved well on with his, and be happy. Do you all think it's appropriate to date with a little baby? Or should I wait? And if I should, any suggestions. Thank you