If using Mobile Web (not the app), click HERE.
If using the App, click HERE.
1. Log into your account.
2. Click the "little man/profile pic" icon in the green bar across the top of the site and select "Edit My Profile".
3. You can now click on each of the tabs available to edit your profile.
Now that you know how to edit your profile, head over to the site and give it a try by clicking HERE.