Breastfeeding and TTC help.

Anyone here breastfeeding and trying for another baby? Me and my husband wanted to have our son and his sibling close in age because our other 2 children (both from other marriages) are very far apart. We have a 16 year old, a 4 year old and now an 11 month old (the one currently being breastfed). We’ve been trying since he was about 5 months old and still nothing. I had what I think was my first period last month but I haven’t gotten it again this month yet so idk anymore. Any tips and tricks to getting pregnant?