My (family) story with chess and why I'd love/need your help

1st of all I am so sorry for all grammar errors, English is not my primary language.

Now the story- as short as possible.

My dad is very old and had me late too. Back in his days, his school was so poor they didn't have a gym but played chess. He and his best friend were great. My dad was able to turn around and play it that way- just by saying the moves.

His friend was amazing too. They got recognized and got offered a scholarship. His friend was able to take it and my grandparents refused to let my dad go to school. His friend finished college, became a grand master and opened a chess club. But dad avoids it as a plaque.

He plays brilliantly for his age but sucks at teaching me. He yells a lot and often refuses to play. Probably a painful reminder of a life he could've had if his parents weren't horrible.

I do like chess and I know basic stuff but I rarely win (I've played as a guest so far). Of course, he won't help me win but yells for mistakes he notices.

I need your help. I love playing it but it hurts me I don't know it and it also hurts he is still stuck. If I knew how to properly play, I'd be able to play with him on his old board and at least he would be able to be happy at his old age.

I hope you understand. Again, sorry for any grammar errors.

@1

"if his parents weren't horrible."
++ Do not be too harsh on your grandparents, they sure had their reasons back then.

"yells for mistakes he notices" ++ That is actually good. Getting better = making less mistakes.

"If I knew how to properly play"
++ Study Chess Fundamentals by Capablanca. In 60 pages it contains all you must know.
It is available for free on the internet as its copyright has expired.

"at least he would be able to be happy at his old age"
++ Your are not responsible for your dad's (un)happiness.
It stems from him and his life, not from you.