What cosmetics are needed for light makeup?

I usually just wear sunscreen.

There are no tinted cosmetics at all.

You might say, "Where is someone like that?"

That's really me...

I only have sunscreen.

I only applied sunscreen.

But now I feel embarrassed when I go to places like gatherings.

I'm thinking of buying cosmetics. What would be good to get?

Mascara? Eyeshadow?? Which one is essential to buy??