Keep up with the Tessitura Jones

Hello all - as a guy who fell into IT via a backdoor called "person-heading-our-conversion-quits-1-week-before-conversion", I've gotten by on SQL and a lot of plagiarism. What I'm wondering now is that as Tessitura moves more and more to a web based product, SQL won't work for upcoming troubleshooting and customization needs. I'm looking for advice on how to keep up with Tessitura's changes: Do I need to learn .NET, XML or anything else to keep up with the more web based moves Tessitura is making? Any suggestions on what I need to go verse myself in to keep up with Tessitura (and remain employed - that's important too!) would be helpful. Thanks!