I wouldn't give up on MI trials until you've been to an event and checked it out yourself. Plus depending upon where you live, WI and N. IL trials are not this way. Novice is easy and Intermediate is usually fine for people with dirt bike experience, but no trials experience.
And if your a natural, we have vintage riders competing in our Advanced sections and winning over the modern bike riders. So it's more about who's riding vs what they are riding (just like everything else).