MyData:
I had a similar problem on Saturday. Set the DI on startup, and got to the hold to find it hadn't moved (not what you want on your first solo consolidation flight). Turned out (after re-adjusting) that the adjustment knob hadn't properly disengaged. From now on I'll be making sure it has positively disengaged and not presume that the spring will do the job for me.
Mazzy (et al): A most excellent thread. I've been following it since January when I finally decided that I'd had enough excuses not to learn to fly and started
I started by trying out a number of schools and aircraft before finally settling on one. Finally did my first solo three weeks ago, after 17 hours and (I think) 7 aircraft (of 5 types)
Keep it up and happy flying