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.