Jumbly
If you don't want to wait to see if you get on the Navigation course
you could always go to MDOCs Saturday Challenges
http://www.mdocmembers.plus.com/

they have courses suitable for beginners
or SELOC have an event at Jumbles Country Park Bolton on 28 February
http://www.seloc.org.uk/fixtures.html

Both would give you tips on navigation