Hi,
If you look at the top right hand side of the page just above the notice about the daily challenge there should be a button called 'My Profile'. Once you click on that, on the left hand side of the screen there should be a button labeled 'edit your profile'. From there you can fill out more information about yourself and choose what you want other members to see

When you have filled it all out, just don't forget to click 'save' at the bottom of the page.
If you are still struggling to find it please let me know and I can upload some screenshot photos to make it easier