Welcome to Steem @chanthasam.
Do read A thumb rule for steemit minnows - 50:100:200:25 for starter tips.
Spend time reading Steem Blue Paper to know how Steem blockchian works and if you still have any queries ask them on our Ask me anything about Steemit post and we will try to answer that.
All the Best!!!
Thanks @steemladder, when I joined Steemit two years ago, There were not much information or rule yet on steemit. It is a great idea that Steemit giving more information to a new user about the Steemit platform and the steem blockchain. Good work and Steem on !