Randy,
There aren't really much for qualifications. Except, as noted in bolting thread, you need to have your CWI to get the endorsement. This is true of any 'Endorsement'. You can take the test without being a CWI, but all you will get is a certificate of successful completion. Does not in itself qualify you to 'inspect' bolting. There is no 'course' through AWS. Just the exam. But, there is a course through another company that the other thread names the web address for more information. The materials are through AISC, the 13th ed of The Steel Construction Manual. It has all the parts in it that the AWS web site names separately: RCSC, LRFD, etc. Just go through anything related to 'Bolting' in the Manual.
I believe I even give details on how to find the info on the AWS site. It is there. Look under 'Certifications', 'CWI Endorsements', and the Bolting Package I believe. I had to click through lots of things to find everything. Even go down through the application form. Look at everything. Will help explain some of the other parts: price, when, where, etc.
Have a Great Day, Brent