INTP mother here. I am older than you, and i have one kiddo.
I don't think you're crazy, but you and I definitely approach this from different directions. Here's my feedback, just as food for thought.
I like your comments on finances, philosophy and religion. I approach these things in a similar way, but I do tend to do it conversationally and when the subject comes up in life, or through stories.
My kid could care less about sports, but he's played a bit of everything from flag football, to lacrosse just to see what he connected with. Turns out it's swimming, but not competitively. We'll be doing snorkeling and scuba.
Get the school curriculum and help them with the homework.
If you have a good school, they'll expect you to be an integral part of your child's homework whether you want to be or not!
I want to then, slowly, start teaching them advanced concepts. This only really pertains to math, but I want to prep them on-- oh, I should say that we're Americans -- SAT, PSAT, ACT, etc WAYYY before they have to take the test.
I do absolutely none of this whatsoever. This is why I send my child to a good school. My kid is smart, he excels in the subjects that interest and engage him naturally. The rest he'll learn because he goes to school and we maintain high standards in the quality of our schoolwork.
Instead, I focus on all the things school can't do. We travel on road trips and in airplanes, we go fossil hunting, we learn to cook, we hike, we collect objects to view under our microscope, we build things with legos and with real tools, we go to festivals and concerts, we take out the telescope, we go camping, we kayak, we learn to identify birds and plants, we watch rocket launches, we get out in the weather. I think my son got his first pair of safety goggles at age 5.
Of course we also play with friends, watch movies, play video games together. We read, we sit around on iPad, we float sycamore leaves down waterfalls.
For the record, I work full time. But you bet in the summer I'll pick that kid up after work and we'll throw down food and go fly kites.
My goal is to teach him how to adapt to new experiences, how to keep his body active and healthy, how socialize with his peers, how to use his imagination and his critical thinking. How we can play as hard as we work.
I want the perspective of what a shitty job would get you from volunteer work
We volunteer as an act of service. This weekend we'll be doing a creek cleanup. I would ask that you use volunteering as a better example - just a request.
And I would think some of the advice would be on how to be a good step-dad
Love. I subscribe to the love philosophy of parenting. Be available. Pay attention to what inspires your kids and feed it. I happen to have science kid. Maybe yours are art or music or math or who knows? Play as hard as you work. Have fun, and enjoy being Santa Claus.