Go to the upper right hand corner of the web page and click on that circle next to your nickname and a box will drop down with 4 symbols in it. Click on the wrench looking symbol.
Then it should take you to another page where on the left hand column is the word Profile and then click on that.
Then you should be at the page where you can change your profile. If there are some things you cannot change, you can tag
@Christ4Ever and he may be able to help change it for you.
That is pretty much all I know. Maybe someone else might be able to add some more information to your request though in what specifically what you want to edit in your profile.
Hope you have a nice day. I hope you enjoy this music video below.