Hello, I have some questions about my body.

As I said I am 15 years old. I noticed all my friends have armpit hair and leg hair but not me. All I have is pubic hairs. My Father is a very hairy guy and I want to be just like him. I'm very ashamed about my legs and armpits that is why I almost always wear long pants even in summer and I don't lift my hands so I don't show my armpits. I have a very light complexion. All my hairs are white except pubic hair is brownish.

Will I grow armpit hair and more leg hair? Will my leg hair get darker?

I am also concerned about my penis size. My penis size is 15 cm erect if I measure it from the pubic bone. If I measure it by not pressing fat down it is 13.5 cm. Will it grow more? Is that enough?

I appreciate any kind of helpful response

Thank you