Taking and Sharing Photos
To take a photo or upload one from your phone or tablet's photo library, first tap 
(iOS and Android) or 
(Windows Phone) at the bottom of the app.
iOS and Android
To take a new photo: tap the blue circle. If you'd like to turn the camera to face you, tap 
. To adjust the flash, tap 
. You can also record a video.
To upload a photo from your phone or tablet's library: tap 
(iOS) or 
(Android) and select the photo you'd like to share.
Windows Phone
To take a new photo: tap 
. If you'd like to turn the camera to face you, tap 
. To adjust the flash, tap 
. You can also record a video.
To upload a photo from your phone's library, tap Camera Roll and select the photo you'd like to share.
Once you've taken or uploaded a photo, you can add effects or filters, a caption and your location before sharing.
Note: You can't take or upload photos from a desktop computer.
Find people to follow
You can find people you might like to follow in Search & Explore. Tap 
to go to Search & Explore.
Scroll down to Explore Posts to see photos and videos that people you follow have liked or that a large number of people have liked
Tap Explore People at the top of the page to see accounts you might like, based on a variety of things, including who you follow, who you're connected to and what photos and videos you like on Instagram
You can also find suggested Instagrammers by going to your account settings and tapping Find Friends on Android or Find People to Follow on iPhone.
see https://help.instagram.com for more information