How To Get A Kitten To Not Be Scared Of You?

How to Get a Kitten – How to get your first kitten Step-by-Step Instructions

I have 5 kittens that live together. They are about 3 weeks old. I do not know how long they will be allowed to stay together before it is time for me to separate them? Also, should I keep the oldest one behind closed doors until he matures or take him out without his siblings? Please help.