If you REALLY want to get to know tube gear (and are really patient), build a ST-70. If you get one of Bob Latino's kits you'd get the experience of building a tube amp, and you'd have a good sounding amp that's switchable between triode and pentode operation. You can manage it as long as you have a reasonably steady hand and can be patient.
If you don't have the time or patience for that, you could start with a book like "Beginner's guide to Tube Audio Design" by Bruce Rozenblit. You have to keep in mind that there's some opinion in the book, but it's a solid introduction into some tube concepts/terminology. It would certainly bring your knowledge base up to speed.
If you don't have the time or patience for that, you could start with a book like "Beginner's guide to Tube Audio Design" by Bruce Rozenblit. You have to keep in mind that there's some opinion in the book, but it's a solid introduction into some tube concepts/terminology. It would certainly bring your knowledge base up to speed.