Hi Randi,
I just opened in January (6 months ago, yesterday!) and you ask some good questions. I've only made 11 sales, but here's what I've learned, in answer to your questions:
My business was started on the day I made a cat toy for my own can. I made a few more, and decided to list them on Etsy. As for Facebook, I have a personal page that I go on, so adding a Page for my shop was pretty seamless (and I put the link in my Etsy profile, so there is crossover). My blog is a work in progress - I have a non-shop-related blog, so started a new blog for the shop on the same blog service, since I already know how to navigate around.
This team has been particularly helpful to me from the very beginning. I make sure to read through all the posts every day, if possible. It is a good way to learn valuable tips from people 'in the know'. No need to re-invent the wheel, when you can just read through and learn from other Etsy sellers! I've met some great people through this team, and appreciate everything that I learn!
Common things I hear in the team threads: practice patience, and list list list! Two key points I think!
Your shop is great, and I wish you continued success as you move forward in Etsyland!