You can look for NARS, Bobbi Brown or MAC (those are the best IME but of course you can try other brands)

Just go to a beauty counter and let them help you choose the appropriate shade. Make sure the undertone matches your skin undertone (yellow, pink...)

You can also get a BB cream or a tinted sunscreen.

Just watch YouTube videos to learn how to apply it

Dermcolor is good,and I was told actors/actresses us it.I use it myself

You can buy a kit containing different colours to find the right shade for yor skin.