16, 5 foot 11, reading TRP for 4 months trying my best to incorporate it into my life. Live with a family of 7.

Recently i broke my collar bone and shit went down. Lost all drive and began to get very angry. After it healing up a bit i am still angry and dont know why. I also get angry at small shit like my brother leaving my door open with the light on in the hall while i'm trying to sleep. I literaly wanted to break something. People always say "Be stoic" but i try to act stoic but it does.not work at all.

My question what is being stoic? How to you become stoic? What is the mentality of stoicism? And why am i so angry?