Moms of 3 kids 4-5 and under

I have two kids 15 months apart. They will turn 2 and 3 this year. My husband and I are curious if the transition from 1 to 2 is harder or easier than going from 2-3. Personally I found it to be not so bad going from 1-2, I just had to reevaluate my routines and time management etc when my second baby became more active. I prefer to have all of my children closer in age and will also be getting a degree in the next couple years and don’t want to have to go out of work again after I have a new career, I would rather finish having babies while I’m still a sahm. So I’m just curious what other families have done as far as age difference, if you struggled with more than 2 kids, so on. Nothing negative please, so tired of some irrelevant negative comments on every post I look at 🙂