How to change your password in Gmail:
When logged into your account, click on the box with your first initial in it in the upper right corner of the window (see below)
When the menu pops up, select “Manage your Google Account” (see below)
In the account screen, select “Security” on the left then “Password”. (see below)
Google may ask you to enter your current password, do so.
You will now be presented with the opportunity to change your password. Passwords need to be at least 12 characters long, and contain at least one capital letter, one number and one symbol (!@#$%, etc.)
Type your new password in twice and hit ‘Change Password’. Your password is now changed.