Read below first before typing your own article.
Add a LABEL by clicking SHOW ALL below the editor on the CREATE POST tab in Blogger to define what page to publish to once you are finished typing.
To make an important post appear temporarily or permanently at the top of a page you PUBLISH POST initially with today's date then go back and EDIT POST, click POST OPTIONS and change to an approriate future date. When this date is reached newer posts will appear ahead of it. Try to use this feature sparingly and only future-date for as long as you feel necessary.
ADD IMAGES/VIDEOS FIRST if you are adding more than one and type text around them afterwards because adding photos/videos after text, although possible, will make you tear your hair out with dragging into position. The first photo added appears last so it is simplest to add photos in the reverse order you want them displayed.
You can add material directly from your email once you set up your secret posting email on the EMAIL tab. The subject of your email will automatically become the title of the article and attached images will be added at the top.