Thanks for the opportunity to practise

X
I'm wanting to include a .png file in the body of a post (say, at position X above) & even though I go through the process of choosing the file, I can't tell where it will appear in the actual post as
Preview is not working. Does this sound correct??
And what happens here if I use the menu icon Insert Image ?
So I Posted. And discover the attachment sits at the end of the post (unsurprisingly, I guess, as an attachment).
And still cannot see how to insert an image at

above - I see the cursor blinking between the two sets of [] but how to get an image imbedded at the cursor's position??
Sorry, but I cannot see from the FAQ/various instructions how to include a graphic file from my own collection (ie not directly from the Net) in the body of a text.
Would be grateful for assistance.