Piano Answers

Hi, i just started joining the world of piano tech, my father was one & i am following his footsteps, he teaches me the basic of tuning repairing & such, but my tuning isnt that good, one of the problem is that when i turn according to the scoop i can make the pitch of the string neutral but after i hit the piano key for a few time the pitch will lower & lower, i use the hammer to pull the pitch higher again & then repeatedly hitting the piano key & the pitch still will lower… Then i go check the part that my dad tuned & i hit the key more then 20 times but the pitch wont drop my dad says that i need to turn the pin so that it wont move but how am i suppose to make the pin stay still?????

I really want to learn the piano, but we don’t have enough money for lessons (also why I only have a small keyboard we got for free) but that’s the best I can do. So, is there any good guide or something on how to play? I’m good at matching what I hear & can read notes, since I played violin for years, but the piano is so big & when I look at piano music I don’t understand it, & which note is where on the piano.
Thank you for the help.(:

Free beginner piano music that isn’t some stupid song I have never heard of. Like disney or modern pop songs.

while playing a song on d piano how do we know when to strike the given chords of tht song. can any one explain with an example so tht i understand better?

Please, explain.