Hello!
I see you are new here, i am here to guide you through your first minutes on here.
To start with, this is called an op, or an original post.
An op is the first post of a thread and it often sets the tone or subject of it.
You can make one by clicking on the large blue button called [make a new thread]
But that can wait, for now stay in this thread and i will tell you all you need to know about posting in threads.