conceiving after first baby, no period yet

My daughter is 10 month, and we want to start conceiving a brother or a sister for her 🙈 the problem is, I breastfeed and I hardly can make her eat something except breast milk. She for sure has 1 whole meal a day that isn't breast milk, but the rest of the day she just eats so little and cries until I give her the breast.:. I tried so many different foods, and she happily eats it in the evening only.... so because I breastfeed so much(I think it's the reason) my period still hasn't returned, which means I haven't ovulated yet and can't really predict when that will happen... does anyone have a recommendation for that? My husband and I both dreamed of kids very close in age, the closer the better, but the period that isn't there makes the possible age gap more and more every month 🙄 I try to cut down breastfeeding slowly but surely, my goal is 2-3 feeding a day by age 1.