now that you have read the TOS you are ready to make your avatar!
in your dashboard tabs is a section called 'avatar' click it to open your avatar invantory screen, don't worry right now about it being bare, we will get to that shortly, in the upper right corner is the editor, click it to start editing.
when you first enter the editor you will have three options, layering, male and female, for right now ignore layering and pick male or female for your avatar base, don't worry about the gender too much though, if you change your mind you can always switch
when you find a base you like click the save button underneath the preview, you will then have the base for your avi
at this point you will open your first achievement 'clean underwear' clicking on it will set off the second achievement 'we have achievements now?' you don't have to click them as they pop up but do note they do not go away until clicked