How do I modify my profile?

I just signed up, and I want to modify my profile, but there is no button to do so! Can you not modify it on mobile? Do I need to use a computer?

You can switch to Desktop view by clicking on "Go to full site" on the bottom of the screen. In this mode, a "Profile" button should appear on the top portion of the screen. You can figure out the rest, as they're all self-explanatory.

Thank you!