Click the arrow by your USERNAME in the top right corner.

Next, click ACCOUNT.

Go to PROFILE SETUP.

Here you can enter information about yourself which can be viewed by other users.

The PERSONAL DETAILS section allows you to enter other details, such as your name.

The HOMETOWN/LOCATION section is where you can enter your city and country.

JOB/CAREER information can be entered in the similarly titled section.

You can input any schools you attended in the EDUCATION section.

The INTEREST section is for your interests such as music and movies.

Be sure to click SAVE CHANGES when you are done.

You now know how to set up your profile in YouTube.

Setup Profile on Youtube