Automatic cursor in context post form

People don't know where to click to use the context post form. Under "What's happening" I would like to put a blinking cursor so people know where to write. I would like to do this now.

Then later as an enhancement, make it so when the person begins to type it opens the context form and automatically writes it into the form. If there is no form, such as photos app, then it just opens the contents of the photos app form for people to upload photos.