Hi! Welcome to HubPages! In order to follow someone, all you have to do is click on their name, which will bring you to their profile page. On the top of their profile page to the right, you just click on the green follow button.
To upload a photo to your profile, click on my profile on the top right of your screen, from there you would click on edit profile, where it should give you the option to change your profile image and post your bio.
I hope this helps!!!