You’re right, but I’m tempted to tell the OP to ignore you 
I got my 26" muni when I’d been riding for 2 months and I was ready for it at that point and got going on it fairly quickly. So maybe not quite immediately for the OP, but he shouldn’t have to wait all that long. Though I was also static mounting consistently by that point (I learned to freemount within days of learning to ride using the method in EASY freemount for Newbies really works!) and got that working on the 26 fairly quickly - it’s not much fun doing muni if you can’t.
As for other skills, I couldn’t idle or ride backwards when I got mine (only learned to ride backwards 5 years later!) and whilst I could hop I did quite a lot of muni riding before using that on a ride. No need for the OP to have any of those skills to enjoy unicycling off road.