If it's reading and use of charts
for sailing, then you could check out online courses offered in navigation
. A lot of them base their courses on learning
charts (centered on East Coast
of the US). They'll walk you through all the basics - reading a chart, plotting a course, taking bearings, etc. At the end you'll take a test to confirm knowledge. I took an online course for this and got a lot out of it.
YouTube is also filled with videos from online courses with details on reading and using charts.
App-wise... once I started using apps, I felt there was little need to think about or look at the paper charts. Still keep them on the boat
, but only use them for large scale trip prep... and would use them if something went wrong with the device/apps.
Plenty of real-world schools offer ASA
(and other organization) certification
in various use of charts, cruising, going offshore
For all of this, Google
is your friend. I'd name the online course I used, but I think it's against the policies of the forum.