No matter how many times you have posted it is still a good idea to follow the guidelines so nothing is forgotten.
Insert Title. This is used as the post address
In the RH sidebar at the top insert your featured image
Upload or select from the media library
Add excerpt under the now shown image
Lower down on the RH sidebar select one or two relevant categories
It's good practice to also put your featured image from the media library as the first image in your post
Add text and other images
NB By default the post will include a RH column containing widgets. Which widgets appear will depend on the category(s) selected. If none (uncategorised) then a blank RH column will be displayed.
NEVER PUBLISH until you have checked and viewed what it looks like. The View icon is three from the right from the PUBLISH/SAVE button.
Spending time on View - Edit - View will make it look better
Don't be afraid to save it as a draft. We can help you improve it more, just ask
Sure? Then hit 'Publish' twice and it should be live unless you set it to post at a later date
Email the webmaster so they can check all is OK