It takes a lot more coordination to ride a motorcycle than people realize. Every feet and hands are operating a different command and you often have to use multiple at the same time, plus your entire body is involved as you shift your body weight around. It's a lot to take in and not being comfortable with the clutch alone will reduce how much attention you have left for everything else. While the course is designed to go thru the techniques one tiny step at a time, I feel it still be a lot to take in for someone riding for the first time. To know what you should do is one thing, to have the coordination and muscle memory is another. Takes time.
There's definitely some truth to the saying the bike goes where you look. Unless you have extensive trial experience, staring at the ground is invariably a bad idea whenever you're moving.
Kudos for not giving up, it's a great hobby and it's worth it.
-edit-
I've dropped my trial probably a few thousand times (goes with the territory) but road bikes never. So I dunno how I rate on the dropped or never dropped scale.