Use the camera button (third button from the left) to upload your picture and the text box button (fourth button from the left) to add text fields where necessary. Use your cursor to drag the text boxes to where you want them or tug the corners to resize.
Switch to drawing mode with the pencil button. Use the tools button to adjust the size of your pencil.
Note that the upload button will not work until you entered text, to prevent empty pictures from being submitted by accident.
When uploaded, you can safe the picture to your drive if you want a copy of it.
Have a little patience to see it appear on the site because it needs to be approved first to prevent abuse. Which we trust you won’t do because you are an awesome being!