I wrote a starters series a while back. It's probably due for a re-post what with all the new people -- but I advise to make a really good #introduceyourself post and maybe resteem two or three posts that you really like before you start commenting. Then let those stay on your page for the first week while you comment, that way people have an idea what you're all about when they come to your page, and if they like it they'll follow.