To create your profile avatar, you can go to the character creator or go to a location and click on the person icon with a + sign. Clicking that icon will take you to the character creator panel, where you can choose or customize your character's style, dress, and other features according to your preferences. In the regular version, you can only create 3 characters of your own. However, in the modified version, you'll get the Character Creator upgrade, which allows you to create up to 27 custom characters.