People advise against getting a 600 for a first bike because they don't want to see you wadd it up, or even worse, wadd up yourself. A 600cc sportbike is a very high performance piece of machinery. Would you learn to drive in a Ferrari? Well your R6 would kick most Ferrari model cars in the 1/4 mile etc.
Now when experienced people tell you not to start on one of these bikes, it's not that they don't want you to have a really nice bike. It's that they really care about you and don't want to see hurt.
An R6 is a kick ass bike. In the hands of the skilled rider it will have the edge on all of the other 600cc bikes in production today. But it does so at a price. It is not as tolerant of your mistakes as some of the other 600s. Some call it twitchy ...
My advice: get something else to start on! A bike that ain't gonna cost you as much when you drop it (and you will - everybody drops their first bike). Get a bike that is a lot more forgiving, and won't get you in over your head as quickly. Spend as much as you can afford on gear - good helmet, boots, and leathers. While you don't have any of the smaller bikes over there that proliferate my country, I am told that an EX500 makes an ideal first bike.
Don't be in so much of a hurry to get that 'ultimate' bike. Play your cards right, and you will be riding for many many years, and own or ride a great variety of excellent bikes.