How to get known

Hi, I'm 15 years old and I want to be a freelance logo designer. However, I have some questions. 1) I looked at the 2012 Olympics logo and saw the creator of the logos website. I forgot the name, but it had over 500 famous companys that they did graphics for. So how will a small business like the one I want to start in the future get any clients.
2) How can I get known early on in my career (around age 20). I'm talking in terms of having people know that if they want a logo, 3d movie, after effects work etc., they can come to my business.
3) Is it possible to make a good steady income just off mainly logo design, but other graphic design projects to?
4) How do you find people to form a freelance business for example, a web designing business. I mean, I'm sure there are people here that might be interested, but it's not as easy as just asking. Does anyone have prior experience with this that I could learn from.

Thanks to all in advance, sorry for bad spelling, english isn't my first language. Also, sorry for lengthy post, and thanks in advance