First thing's first, you must create an Etsy user account. It is a very quick and simple process and the best part is that it's FREE to sign up. Click here to follow the step by step process.
Even if you don't plan to sell or buy anything right away it is helpful to create an account to bookmark your favorite items and to participate in online workshops and forums. There is definitely a lot to do and see on Etsy and it is not solely limited to buying or selling.
Still confused, timid or unsure about creating an account? Then just read Etsy's FAQ. It's packed with loads of useful information and there is also a contact feature for other questions not addressed in their help pages. I have had to use this feature myself and was pleasantly surprised by the timely and friendly response.
If you have any other questions or reservations, please don't hesitate to ask.