I'd say that the displacement is appropriate for a beginning rider. Being a relatively unknown brand may be a concern from a parts availability or reliability standpoint. If you're not abusive to the machine you may be able to get your money's worth out of the bike without trashing it.
For that money, I'd keep this bike in mind but also look for a Honda XR200L dual sport bike. Same displacement but in a street legal dirt bike package that will be more resilient to abuse and have more readily available parts. There are probably other ~200CC dual sports that I'm not aware of that a quick search should reveal.
Good luck with your decision and purchase. I think that you're on the right track by picking a lower displacement machine to learn on. Despite what a lot of people say, a 600cc sportbike is a lot of motorcycle, and I think that if you can take the time to learn on something smaller you'll be a better rider for it. Learning will likely be less intimidating and more fun too.