Hello, lady who loves horses.
Isn't that the way it goes .....everything works perfectly, and then it seems as though the machine has turned on you! [:'(]
I have never taken lessons and lessons cannot prevent a spool of thread being defective or stabilizers not living up to the mfg's promises.
I have found a lot of information in books, especially those by Jeanine Twigg - http://www.embroideryresource.com/html/eme.html
This is also an excellent site for tutorials and videos - http://www.emblibrary.com/EL/elprojects/holder.aspx?page=techniques
With these books, tutorials and forums available today, you will soon know more than the people who work for the SM/EM dealers.
There weren't any forums when I started, and dealers didn't know squat. As recent as two years ago a local Bernina dealer couldn't even demo the software....and she owned the shop! However, the manager at a local Babylock dealer was absolutely the best, so I have an Ellegante instead of a Bernina.
For ME forums, my personal favorites are ATG and Sewforum and I visit a few other sites gathering information and techniques.
Test your design to be sure the stabilizer/thread/fabric/design are made for each other, or if they will fight each other.
Best wishes for many successful, fun projects.
Pattiann