It really just takes practice. Start out with neutral colors for natural everyday looks as you learn techniques and gradually add more bold color when you become more confident in your technique.

Youtube does have great videos. Look for "gurus" that have similar coloring to yours. Also, if you want to invest in good makeup and tools, you can go to any MAC store or any makeup counter with trained makeup artists. They'll help you choose colors that suit your skin tone and show you how to apply looks for everyday or special events.
naturally 3b/3c

Explanation by the tongue makes most things clear, but love unexplained is clearer. ~ Rumi