Follow/Unfollow: How do I follow someone who isn't in my followers or followings list?

Visit the profile page URL and you click the Follow button. 

Not sure what the URL is? 

Try this out:

1. Copy this URL on your browser:
https://websta.me/n/

2. Add the user's username. An example is:
http://websta.me/n/websta_me

3. Click enter.