If you really eager to improve, i suggest that you use the money for a coach.
Even if it just for 1 or 2 month, pretty sure it would benefit & improve you further rather than a brand new decent racket.
Afterall as you are still new, any racket wont feel any different in your hand.
Unless ofcourse your current racket are just kids toy then its good choice to start getting a real badminton racket.
Whatever it is, its your money & your decission to make & im just trying to give little input for you to consider. About the racket, dont get to attached with brand. Small brand like Apacs, Flypower, Hiqua also had some nice lineup to choose with cheaper price but comparable or even better quality with the big brand like Yonex, Victor, or Lining.