what is a good starting point for a newbie account to participate bounty? I already have tweeter and facebook account, can i start it
Yes, you can start as a newbie with the Facebook and Twitter campaigns especially if you have good accounts with a lot of followers and friends. Also, you can try the content creation campaigns if you have your crypto related blog. At the same time keep building your bitcointalk account until you rank up and get the member rank at least to join the signature campaigns.