How do you manage to achieve rich colors, smooth lines, so that there is no debris?

Question

Adobe Illustrator

Hello, I tried to draw, but I have some questions, help:
0) How do people achieve such a rich color?
1) Why is it that when I try to draw element No. 1, it turns out because I have ie the pen tool does not do as I want, but makes incomprehensible zigzags. You have to complete the line and start over.
2) How can I eliminate such pornography as number 2?
3) How can I make the lines smooth and not as square as mine (3)?

Answer 1

0) Just ask.
1) Do you have a pen drawing by you? Or are you still them? The tool can't do things you don't want to, because you're the one in control of it. And if something goes wrong, then you are not managing in the best way.
2), 3) Draw correctly, not as you have to.
See example: https://www.dropbox.com/s/j5kr14aawi9kmd2/logo.ai?dl=0