Make sure to relax on this journey. There is a convincing case that education doesn't impact life outcomes much at all (e.g. The Case Against Education by Bryan Caplan for a recent book).
Therefore I'd advise to let your kids have fun and educate them around whatever that fun thing is, like how Montessori does it.
I was homeschooled and am homeschooling our children. The best part is the flexibility and adaptability. Embrace it.
Learn through living. Having your kids alongside you is probably a more representative sample of what living their lives will be like than age seperated peer groups forced to congregate in the same building each day.
how Montessori DID, she died in the 1952. you should contextualize her "free work" in the period of her life, certainly letting the kid free is what we can call let him do whatever he find fun.
Therefore I'd advise to let your kids have fun and educate them around whatever that fun thing is, like how Montessori does it.