Welcome to Germany! I was stationed in Darmstadt for 22 years before retiring this April and remained in the Darmstadt area.
I bought all of my Festool equipment, as well as my Minimax SC2 Classic saw and dust collection ducting, from
Dr. Keller Holztechnik in Mannheim. Most of the sales staff speak English and they accept the VAT form for the tax exclusion. There are likely similar stores in the Kaiserslautern area, but Mannheim is a short drive from you, and worth the trip. The down side is they are not open on weekends and close for lunch; however, being retired now, this is not a problem for me.
You didn't mention if you speak German, but the only place I know of in Germany that offers woodworking classes (no Festool) in English is
Dictum, with the main store in Munich. Dictum has stores throughout Germany, but the Munich and Niederalteich stores seem to have the most woodworking courses. You might try the
Wood Skill Center on Ramstein AB for suggestions on courses.
One caution about buying Festool here is you will only find the 230V 50Hz versions. These might work in the U.S. if you have a 220V distribution.