@jojoz My first 2 kids are 2 years apart. Baby number 3 is 4 years younger than number 2 and 6 years younger than number 1. So they are currently 15, 13 and 9.
I have some thoughts. It was a little tough at first. The older 2 were doing big kid things and the youngest was a napping baby and then a toddler who of course never wanted to sit still. It was a little rough sometimes coordinating play dates, practices, and baby stuff.
Now that they are older, I have 1 in elementary, 1 in middle school and one in high school. 2nd year (and last) year of this. It's been kind of a crazy logistical adventure. But next year my middle will be in high school and we will be back to 2 schools. My husband and I work pretty flexible jobs, so that helps.
I feel very fortunate that my kids all get along quite well with each other, minus the usual squabbles. I think their age gaps are just fine. Our 9 year old rounds out the teen angst nicely some days, and other days it's like having a 3rd teenager!
I don't really have any regrets about their age gaps, though I sometimes wonder how having our 3rd baby sooner would be. The early days are gonna be crazy no matter what! But definitely consider their age gaps in school.