When logged in, select your username menu, at the top right, and the ‘Profile’ option:
This will take you to your Profile editing section. Change your picture by clicking on the camera icon and uploading a photo.
You can also change your header image through 1) and edit your profile information like your biography summary through 2).
Option 3) the ‘Widget Settings’, enables you to then add a variety of widgets of information to your home page. These are helpful for showcasing your profile within a business network, such as your Skills, previous Projects, videos of your work and so forth.
To add each widget, select the type you want to add, then Add new.. enter the details then select Save Changes.