Frank-p'bucket is easy.
I open a thread here and hit the reply button with 'more options'.
That gives you the full editor. Begin a post so you can insert your picture in your post.
In another window, I open P/B and follow the prompts to open an album. Then select 'upload photos'. Your picture folders will be listed and select a file (picture) you want. Upload it in a 'medium' or 'large' size. When the picture appears on P/B, there's a small 'gear' icon on the upper right of it. Click that and select 'get links',
At the bottom of the list, left click that and it will illuminate 'copied'.
Then go to your MCM post and look for an icon across the top that shows a 'link-or lock'. Click that and then right click and paste in the code you got from P/B.
Them select 'preview message' and your picture will be there.
HTH-'cause your stuff's too good not to be seen here.