Don’t get too wound up about this. Trust me, if you have the intention and motivation to teach your child at home, you’ll do fine.
My wife is a victim of the Florida public school system, yet she’s home schooled our four kids since 2002. They’re all much more accomplished in the academic area than she’s ever been.
There are tons of lesson plans and scholastic home schooling packages out there. Almost any of them are a better base than what you’ll find in the public schools. Just get started and do not fear. Americans did this for generations with very few tools to hand.
You’ll do fine.
They are more accomplished than her, I can believe. Certainly my students are. I like the analogy of how a machine can be used to make a machine more exacting than itself. The same is true of teachers. Moreover, I tell everyone I instruct that I want them to do better than me. Come back and show me whether I did a good job and how I could have done better.