It is seriously something to consider.
When I started my Intro to Tech course, I had no experience with doubles, dry suits, etc. The learning curve was extremely steep, and the experience was downright humiliating. I am extremely glad I had all of that well behind me before I started cave training.
Like Lowviz did, I've been diving my gear a year . . . Took sidemount Jan '11. However, I'm sure I'll find a "should have been better" in there somewhere.