Hi all sifus... need your help to advise noob here, especially from those who takes awesome 'instagram-worthy' pictures of their gf/wife.

Please give as many tips as you know on how to take all the instagram-perfect photo of gf/wife.

Sun light/lighting:
How to adapt to the light? Strong light, soft light?

Skin tone:
Quite related to lighting... how to shoot the fairest skin-tone?

Angle:
What angle is a no-no? What angle to make her look taller? What angle to hide imperfections for example if she doesn't want to show her neck and jawbone too much, and a cheek that looks sharper?

Candid/Street:
How to candid? Best situations to catch awesome candid shots?

Composition:
My composition sucks. Where to place her in the photo? Near? far? Mid-distance? Background? Face? Body? Leg?

Direction:
How to direct her? She's already a good poser because there are many people who praised her for knowing how to pose, but my photography skill sucks. Need to know how to guide her for the perfect shot.

Anything else to worry about?

Thanks!