How does one become a Fashion Designer?

Where do you get your supply of materials, etc. I have a designer mind and was wondering about the fashion industry. Whould a fashion designer school show me how to make clothes by hand, etc. I would probably be able to do the designing part. But, don’t know about actually making the clothes. I mean, if I wanted to start my own line, couldn’t I just design what I want with software. Then, have workers actually make the clothing, etc?