Hi! Welcome to Geocaching! There are several things you can do to learn how to geocache. Metro Vancouver Parks are offering an Introduction to Geocaching course on Sept 27th at Pacific Spirit Park Link
Hands on is also a good way to learn. For more casual learning come to an event (all BC Events are listed on our calendar on the main page) and chat to experienced cachers.
There a few meetup groups, a couple of them are in the Lower Mainland. They are usually open to anyone and members are very helpful. Here is one that has several events coming up Link
Metro Vancouver Geocachers Link
are a very friendly bunch and they have a forum section for Caching Buddies.