Why don't you contact your local Trials club and ask if they have or will have a dirt bike/beginner class? Most clubs will do most anything to increase their turnout at events.
An enduro bike with low gearing, steering stops ground for max. steering lock and a rear Trials tire can be quite effective in the novice lines of an Observed Trial. And yes it will make you a better rider for the Hare Scrambles.
It's not a big motorcycle, just a groovy little motor bike.