Also, you could try to find out if there is a maritime academy or college
near you that gives courses to the public.

to learn nav? what on Earth for? That is like going to a college to learn how
to brush one's teeth.

nav is simple. even more simple on the St. Croix River. Upstream is north,
downstream is south. Hit the dam and you are in St Croix Falls (east, where
the sun comes up) or Taylor's Falls (west, where the sun goes down).

Alan, don't sweat it. nav is easy