Hi Jim,
Hope you are well!
There is no problem inserting any picture in WordPress post or page, in fact anywhere that you can use html. As long as the image is publicly accessible.
This code will include the image with a link to the same image – so when you click it the browser will go to the image location.
You can link to something else – like post, page or another domain.
<a href="https://localhost/images/26well_2014_6.jpg"><img class="alignnone" src="https://localhost/images/26well_2014_6.jpg" alt="image_alt_title" width="215" height="300" /></a>
Width and height are for the showed image dimensions – you can use smaller ones for a image preview and link to the bigger one.
But you will have to adjust this manually, because if the proportions are not right the image will show blurred.
If you don’t want the image to link anywhere and just show the image, you can use something like this:
<img class="alignnone" src="https://localhost/images/26well_2014_6.jpg" alt="image_alt_title" width="215" height="300" />
Let me know if this helps.
Thanks,
Ivan