Hi!
Regardless of having flown sim or not youre going to crasch that Extra in no time because youre not accustomed to flying anaircraft in the real world (sim planes always throttle good and never snap-roll ). Simulators isn't the same as the real world.
And its those small deviations that make the difference of going home with the model complet or going home with it in a bag....

Some advise! Get a high winged trainer with square fuselage and learn basic flying. then go for a low winged sport airplane...then the Extra...or something betetr or more fun (Extra 300 models in that size does'nt fly that good)
-It's strange.... Newbies always think that they would just need one airplane...on the contrary, you can't get enough of airplanes . Always strive to have at least some airplanes in your stable...crashing is mandatory. Why do the crashing with an Extra 300?

Regards!
Jan K