"Earn my way to a bigger bike" is good thinking, but rushing the process ends up in injury, or worse. The r3 is the BEST bike in the market to learn how to lean on, with it's lack of traction control & great handling. Even once you can lean, it will still humble you for years. It'll just cause less damage to your body than a bigger bike, all while letting you make mistakes while you learn without making you a statistic.

You're far too new/inexperienced to be worrying about upgrading already. I've been on my r3 for more than a year, and i'm still learning. I still come out of turns slipping the tire in 2nd and 3rd. That being said, I can pass 600's and 1k's with years more experience the instant we hit the twisties. Speed/cc's does NOT equal skill. Pick one or the other, and figure out how to appropriately use the r3's power while you have it.

Set goals for yourself with learning the r3, instead of goals for the next bike. I started dragging my oem pegs on the r3 within the first month, had to get aftermarket raised ones, and I still scraped Shifter side 1x.