Go to Busy.org, and select log in. If you are totally new to Busy, you want to Create an account, but since it links into your Steemit account, you should login. Then it should automatically see that you are logged into Steemit, and you should click "Log in". If your Steemit password is not already there, then type it in (the long password given to you at the beginning). From there, it's easy to post (just click the pencil under your profile picture. It pulls almost all your information from Steemit!