continued: you can then also join groups. when you do, activity in those groups will also appear in your activity feed. your followers will see YOUR posts in their activity feed. if you have a minute, it's probably much better explained here: http://culinarybytes.com/bites/faq -
a great way to find people worthy of following is to click home, then on the left side look of EVERYBODY. (below the highlighted "My Activity Feed" If someone looks interesting and makes good posts and you want to follow, click their avatar. Next screen: In the light blue area to the right click the icon that says 'follow....' - you now get his/her posts in your activity feed.
more: although your initial post is limited to 160 characters, the comment area is unlimited, so your answer can be as longwinded as need be. Let me know if that is getting you started.