Looked at from the child's point of view, even at its best mass education is bound to be very inefficient.
First of all, consider all the time in the school day which is not being spent on anything ostensibly educational. There's time spent waiting for everyone to settle down so the teacher can talk, time watching other kids be disciplined, time queuing up, time waiting for your turn with the glue or red paint or computer or scales, time waiting for materials to be distributed and papers to be collected, time waiting for the teacher to come help you when you don't understand, time waiting for the others to finish when you've done your work quickly, time spent being assessed so the teacher can see what you understand. When I was looking round at schools for my eldest daughter, most of the headteachers gave me a whistle-stop tour of all seven classes in the school. In three of the four schools I visited, by my estimate overall 50% of the children I saw did not appear to be doing ANYTHING educational at the moment I put my head in. They were just sitting and waiting. I remember that well from my own school days. It was soul-destroying.
Secondly, even when a child IS doing educational "work" at school, think about the tiny proportion of time when the material is perfectly targeted to his needs. Much of the time it is too easy and he already understands it, or too difficult and he's floundering, or poorly explained and he doesn't know what he is supposed to do, or ill-suited to his learning style, or not engaging with what interests him at that moment in time.
All of this means that home education, in whatever form it takes, is astonishingly efficient when compared with school. If you give school a miss, you are giving your children about 1000 extra hours a year, not including travel to and from school, homework and other associated time-eaters. There will be time for lots and lots and lots of learning in your day, alongside relaxing, playing and doing other things which some people say are not educational (but which I think really are).
You can be as laid-back as you like, and your children will STILL have plenty of interesting opportunities which they wouldn't have had if they went to school. Or you can be an overachiever very academically focused by teaching them five languages, reading them the Odyssey in the entirety and visiting every known historic site in five counties. Or something in between.
When it comes to it, you'll know what feels right to you and what suits your children. It's hard to get your head round at the moment because they are theoretical children and you haven't been living with them for the last few years. But (unless you send your kids into school, or remove them from school) major educational decisions won't appear suddenly when they are four or five. Just as you will find your parenting style gradually over the years, you will figure out how to educate your children over the years.
By all means read up on different approaches, read blogs, and meet families who are doing different things. That will help you have some ideas to choose from as your children grow up. But you don't have to have it all laid out in advance. It will come to you.