In my case, the "knowledge" came from a love of learning - instilled mainly by my Dad, who was a walking encyclopedia of knowledge and never stopped learning himself.
The skills you pick up as you go along, much like you pick up the skills of parenting.
There was no fixed "timetable" as such but there were regular co-ops, sports, socials (there are home ed groups everywhere that families can hook up with) and those regular commitments set the weekly timetable in effect.
We did no more than half a day of academics on any given day, whether that was KS1 or GCSE.
There were absolutely loads of trips, at least one per week, to museums, education workshops (including the kinds that schools access), talks at places like the RI, author talks, lab work, theatre, factory tours, shows - it literally ranging from the sewage works to the Royal Albert Hall.
We did not follow the national curriculum (although obviously we had to follow GCSEs syllabus when the time came.)
All of mine got as many 8-10 I/GCSEs. At least one would have been deemed SEN if in school.
Obviously all of this takes effort on the parents' behalf and a willingness to plug any gap you identify in your own knowledge, skills or available.
Home education and school education are very, very different and therefore the skills required are not the same.