Hi Yanyan, welcome to Steemit! There's a lot to learn in this platform and surely in time you'll know them all. Research and ask a lot of questions to people to really engage with the community!
I have to say that I am 75% coffee and 25% alcohol. Tea for me is like warm scented water, never really got the hang of it. Anyway good luck in Steemit! :)
RE: First Post. Hello Steemers! Glad to be a part of the community.