Thinking about trying for another baby

Brittany • Mommy to a wonderful 12yr old boy, 9yr old boy 7yr old girl 6yr old girl and 3yr old girl. Due March 11th 2023 with a boy.
I see women who get pregnant while breastfeeding so I know it's possible but when do you start ovulating again? I want to start trying when my little ladies 5-6mths old so my 2nd and 3rd kids are only 15 months apart.