You could access the VSCO Search area by tapping here.
Tap on the Explore icon to go to your Feed, and tap on the Profile icon
To add from your phone's contact list, tap on Contacts.
Tap on Follow for any user you want to follow on VSCO.
If you don't see any contacts listed, please visit your device Settings and allow VSCO to access your Contacts.
To add a contact from Twitter or to find someone by their VSCO username, tap on the + icon in the top right corner.