All of this advice will apply to all types of guitars. However, with a 12 string being strung in courses it is capable of giving of a sound especially similar to a mandolin. Depending on your guitar you will need to adapt to get the closest sound, so here's some suggestions.
Click on the link for the lesson.
1- Understanding the mandolin
2- Fifth tune and capo
3- Playing style
4- picking style
UNDER CONSTRUCTION COME BACK SOON