On the Ayrshare Dashboard, go to "Post" in the left-hand navigation. In the entry box, type your post and optionally add an image. Select which social networks you want the post to be sent to with the buttons in the grey area at the bottom of the post box.
If you want to post immediately, click Post Now.
If you want to schedule the post for a future time, select the date and time from the field, and click Schedule For Later.