Go find a good used Blast, Ninja 250, GS500F or Ninja 500. All of those are not hard to find used for a good price, won’t lose much value for riding a season, are somewhat sporty motorcycles, and most importantly are good motorcycles to learn the basics.
That Gixxer you have looks great and I’m sure you will enjoy it at some point. But it requires a tremendous amount of respect to ride safely and the first step in that respect is realizing it is not the bike to learn to ride on. It is a bike you learn to ride after you have mastered more basic motorcycles. You’ll appreciate the supersport much more and you will be much more likely to come out in one piece.