Think about two things:
You have to get a higher rank in prison. The lower the rank, the more shitty your life is going to be. This isn't only about sex in the showers, this is about all of the little deals that go on a the prices you have to pay. For the top hinchos in prison, more stuff is available at reasonabler prices.
Don't try to get friendly with the wardens. Inmates hate guys that are potential stool pigeons.
You may not have to beat people up, you can stay to yourself. Be careful who you befriend.