Watch the Don't Have a Dobro? online guitar lesson by Jimmy Heffernan from Dobro Handbook
This course is designed for guitar players who want to learn how to play dobro, however most guitar players won't have the dobro laying around, and while some really good dobros can be purchased for just a few hundred dollars, it often makes better sense to simply convert an old acoustic guitar to a dobro and start learning that way.
Converting an acoustic guitar into a dobro is very inexpensive and very easy to do. This video will walk you through the conversion process and also advise you how and where to get the parts that you'll need for the conversion.