Yay dulcimer!

I also play with the thumb, for good or ill. I have really small fingers so I have to take what I can get in terms of fingering ;)

In addition to Neal Hellman's "Dulcimer Chord Book", I HIGHLY recommend his "Celtic Songs and Airs for Mountain Dulcimer". Great arrangements, and a preface that includes playing notes, historical notes and a select discography for EVERY SONG! I knew I liked the book when I realized I owned most of the CDs he lists. There's also a CD with the book, where he plays all the arrangements. Just a great book.

Have fun! I can't remember who said it, but my favorite mtn. dulcimer quote:

"There ain't no notes on a dulcimer--you just play it."

Molly