Piano
 

Hello, I don't read music sheet, I play from Youtube Piano Tutorials but I have some questions that always jump into my mind without having answers to them:

- Will learning reading music sheets (understanding notes) will help me in playing some difficult complex pieces that make you think for a while that you should have more than two hands to play it, and also the ones with completely different and hard rhythms between two hands? or is it just something that has to do with practicing?

-Could artists and piano players play sheet they read for a first time perfectly if you gave it to them?

- Sometimes when I stop playing some songs or pieces of music for a long time, I forgot how to play it (but I can remember how to do so if I just re-watch the tutorial or try to practice it for like minutes). Is that common even for professional piano players? Would it be different if I learned music sheets?

- Can some people really play things if you make them hear it for the first time?

In theory, yes it should help.

They obviously won't play it absolutely perfectly, but it will likely be much more perfect than someone who cannot.

If you learn to sight-read sheet music, yes.

Some people who are good at playing by ear, yes.

If you forget how to play a song you know, it could be that it is not stored in your "muscle memory." If there is any secret about playing an instrument is that musicians do not conscientiously think what note to play next like you do when you first start out learning. They rely on muscle memory which comes through repetition -- a lot of practice.

Sheet music helps to a certain extant, you know the tempo and what notes to play, the form of the song but the feel of the song comes from hearing it, imo. If you learn from sheet music, (or even by ear) don't worry about the tempo, play it as slow as you like until you have it down pat. Speed can always come later.

Thank you.
Will keep learning and practicing to play more and more of music pieces make the hard ones become more easy to play?
Like a piece seem complicated and hard to play, but then you learn other pieces and keep practicing and playing, will it help you in the first one (the hard one)? will it improve your ability to play and learn fast in general?