Show your fans what you're really about! To edit your "About Me" section, first go to that section of your profile by clicking the 3-dots in the top right and clicking <About Me>. (For mobile, click <More> at the bottom of your profile and then <About Me>.)
Next, click switch that says "View Mode", this will switch you to "Edit Mode" allowing you to edit the below fields and enter in all the details.
Make sure to hit save once you've added everything!