Character Creation System For Players

Hello, I`m going to use Unreal Engine to make a game, and I realized a good thing to add to the game would be an extensive character creator system for the players to use. The players would being using sliders and options would be something like this: Obesity, Hip Width, Mouth Length/Width, Leg Length, Hip Size, etc. Just stuff about with the body because the clothes would already be chosen. You could only be a human though. Male or Female, but anyway I thought it would be a good thing to add, and I was wondering if an extensive character creator system would be built in, or if I would have to download one and add it into the game before the players start to play the game. Thanks!