After clicking on the Login button you will have the option to sign up quick (this will give you access to all of the awesome social features, giving you the ability to comment, get feedback on animals and plants that you would like to have identified and so much more)
You will fill you the short info area. giving yourself a unique nickname if you would like to stay anonymous or if you have a business name you would like to go by.
Then fill out the info you just set up.
Then click on your profile and BOOM! You are off to races!