First of all, congratulations for being smart enough to realize you don't want to fly the Mustang right away (probably 3rd or even 4th plane).

COULD you learn on the 4*? Yes. I learned on a VERY similar low-wing tail dragger, but I crashed it SIX TIMES before I became somewhat proficient. Like blwblw said, you need to talk with your instructor about if he/she would be willing to do so. If you don't plan to use an instructor, DO NOT ATTEMPT TO LEARN on a 4*.

While the 4* is a fantastic plane (see below), you would be doing yourself a disservice by starting off with one. There are just too many things to learn as a newbie without adding ground looping and other fun stuff into the mix.

Welcome to the hobby and Good Luck!