Your father has clearly been open about his psychonautism and using of psychedelic drugs, why won't you just listen to him and wait a couple years?
And if your dad is a shaman - a
shaman, not a random dude who has read a bit of Terence McKenna - I don't think he wouldn't appreciate the attitude "I want to hallucinate, I really really want to hallucinate". What makes you want to "hallucinate" (hallucinating means seeing things you believe are real, I think you mean visuals) so badly that you think your dad is wrong about you not being ready?
You are growing right now. Your brain is releasing all kinds of new hormones. Your brain works in a different way when you're 13 and when you're 16-21. I haven't read any documents about how psychedelics can affect puberty, but if I were you, I wouldn't risk it. They may affect your brain in an unwanted way. They can also be way too rough for a young person like you.
You should be thankful that your dad has been so open about psychoactive substances. Wait, try lucid dreaming, try sensory deprivation if you're brave, try meditation. Read some books. Live! Fall in love before trying psychedelics. Start making music before you try them, start writing poems before you start them. Visit a Japanese garden before trying psychedelics. Then, when the time is right, you can trip with your dad (a thing most of us will never experience, it should be just great
).
And, if you really decide to try something,
do not try nutmeg.