I very recently acquired a F800GS (2013 model). It still has brand new anakee tyres on. I went My question is as follows (aside fromt he obvious need to go for a bit of training):
Would it be a good idea .....
Sorry, am giggling here..... NO!
Learn to ride, sorry - but "offroad" means less stable planted feel, of course (!) there is slip hence movement etc, and tyres actually are VERY overrated in this respect, they ALL will squirm.
Sure, some do more, some do less, but this is nitpicking..... learn to get used to it!
Sure, if you think you yourself would feel better with some lessons under your belt then do that, but I think that 'just doing it' will teach you quickly that it all aint that bad, you didn't fall actually, and hey, if you open up a bit then all's better/smoother etc >>> you are learning!
Stay away from deep sand for now, ditto loose rock gardens, and you'll get the hang of it in a jiffy!
Better tyres will make a diff yeah, but very little, and for an off-novice (sorry...) it ain't worth the money/schlepp/cost/time/effort > learn it, get used to the "less planted" feel, and you'll learn that it will not wash but stay there sortof, you just have to put more input in!