That is not an easy question. When the young roosters reach maturity, they sometimes become very agressive. He may calm down with time, as he ages, or maybe not. I've had a few really mean roosters, and I've had a few really nice ones, with great manners.
I used to have to keep a rolled up magazine in my back pocket when I had my Black Copper Marans rooster. That roo would fly at my face, attack me from behind, you name it. So I used the magazine to give him a whack, without actually hurting him, but I'm sure it stung a bit. Truthfully, it didn't help much, and he would still come after me the next time he saw me. It made chicken keeping unpleasant, as I was constantly being stalked by this rooster. So I sold him with a warning. He was a huge beauty. But, I'm glad he's gone.
Wish I could tell you he'll be fine and turn into a nice rooster......
Good luck,
Sharon