Moms with 2+ kids - Question!

My husband and I are trying to plan for #2, and I was just curious if anyone had advice based on your own experience of caring for a toddler and a baby simultaneously - I’m a SAHM, and was originally planning to wait until my son’s 2nd birthday, but we’re considering closer to 1-1.5 - I went through years of fertility treatment, so “trying” involves a planned embryo transfer... I’m trying to consider a lot of different factors, but I’m not sure if I’m overthinking the timing.