Improving my riding skillz

In line with ZIPP2001's post about still having his cat-like reflexes https://www.bikeforums.net/fifty-plus-50/1135749-old-but-still-have-my-cat-like-reflexes.html I went up to Cuyuna state park in Minnesota to do a little trail riding. I do just fine on single track when it's dirt. I'm slow but...