How should I wear my makeup?

So I'm the kind of person that never wears makeup. I never felt the need to. But over the last few months I could see in the mirror that I think I should start. I notice I don't see my eyelashes anymore, and my lips are so pale compared to in high school. Some days they look the same colour as my skin.

I tried to start just putting on only mascara and lipstick, but I think I just need help from people who actually know makeup.

What should I start with? What colours should I do? Help!!!!