If questioning whether one is up to remote long distance motorcycle trips I think the question is often misplaced in evaluating prior riding experience. Of course it is ideal to be a skilled off-road rider. But it might be better to instead ask yourself whether or not you are prepared to be self-reliant enough to deal with likely mishaps if assistance is unavailable. Most trips don't require very advanced technical riding skills, but most any trip could require you to be able to do things like properly diagnose and repair common mechanicals on your bike or deal with an unexpected get-off of yourself or a riding partner. Hopefully you have considered these aspects of your journey as much as you have the actual riding of the bike. If you are sufficiently prepared for the unexpected, then by all means get going, because the only way to become a better rider is to go out and ride.
Squirrels of the world unite!