I have been playing for a while now although I still consider myself at beginners level. I seem to be caught in a circle where I get excited, make progress and then hit this invisible wall which prevents me to go any further. I think one possible reason could be I'm a left handed person although my old teacher strongly suggested --since I'm starting-- I should try and learn how to play right handed guitar. I try and try but i find my left hand much better at keeping rhythm and versatility.
I even unconsciously do lefty air guitar.
Should I follow my lefty instinct or keep trying play right handed as my teacher suggested? Any advice would be greatly appreciated.

Regards,
Remo