Go to My Profile.1.png
From here you can change personal details like names, username, email and language. Also you can add a signature and format the text as you wish.
To add a profile picture Delete current photo or if it doesn't exit click on Upload picture.
You can also add an avatar instead of a picture by clicking on Select avatar an scroll down until you find one you like.
Click on Menu and from here turn on/off all the modules from the site as you wish.
From here you can change you password or add a two steps verification.
When you're done, don't forget to Save.