Are you planing to continue on with a classical style or go to a flat top acoustic.
A classical guitar has a wider neck, so a flat top (Full size) may be easier to play for you. Also a proper set-up will make a world of difference..
Like most people here subscribe to the theory of "try before you buy". Try many.
Manufacture that pop into mind are Taylor and Yamaha. Looking through prices on line it seems that 3/4 size guitars are aimed at youth.
If you watch this video you will see size does not always matter.
https://www.youtube.com/watch?v=xnrmXgj4Q6U
good luck finding the right guitar