Get something that you will not be too upset over laying down a time or two.
And preferably something Fuel Injected.
Most of the newer 600's are stout and come off the showroom floor as very capable machines.
My preference has always been to learn on the dirt, then with a bit of confidence, transition to doing a track-day or two... with coaching.
Regardless, have fun, be safe and ride within your limits.
ATGATT
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One of the consequences of such notions as "entitlements" is that people who have contributed nothing to society feel that society owes them something, apparently just for being nice enough to grace us with their presence.”
Thomas Sowell (American Writer and Economist, b.1930)