It really doesnt matter what the hell people think or say. Have a concert, have a few, so what?? The worst that can happen is that they'll laugh, make jokes, and ultimately make utter fools of themselves in the process. Do you really need their acceptance over doing what you love? One of the most important factors of a performing artist is to PERFORM! Really, otherwise what is the point? Play concerts, play recitals. If for no other reason, for yourself, and your life. Because ultimately, they will exit your life, and then where will you stand? Somewhere in the middle, feeling regret for not doing more earlier.
As a pianist, you are the star, you are the showoff. You are doing something that many people could only conjure up in their wildest most far-fetched dreams. Stick it out, regardless, and the results will be phenomenal.
I have the utmost respect for those who are determined to do what they love and believe in, even if it leads them through hell and back.
How far are you prepared to go?
Good luck,
Danyal