I played MI in college and didn't do a "fielding drill" till I got there and even that was limited. However what I did do was take A LOT of GB growing and also watched a lot of games and tried to emulate. There was no internet and my main "instructor" was my father who didn't do drills growing up, he played sandlot ball all day. So he didn't do any drills with me. Times have changed, there is a lot of good information out there now which can be very useful if you know what to look for (which can be an issue for some parents..I understand that). I found that I knew what a good fielder looked like but didn't necessarily know how to to explain it well other than to show my kid "this is how you do it" which isn't necessarily the best way to teach somebody. So I went looking for information and it has been very helpful in developing my DD imo.
"The more you know, the more you know that you don't know!" ~ Aristotle
I guess it all starts by accepting a need.