Wow that's a lot of work but thanks.
You gotta put in some work mate. The steps shown by OmegaStarScream are simple enough and all you got to do is practice. If you don't want to create an account for image hosting services like imgur, here's another option
https://postimages.org/. You can also upload there by URL.
~
You're right. I'm exhausted now.
You can also resize the image
[img height=300 width=400]https://d3qyakrvrexrh3.cloudfront.net/wp-content/uploads/2017/11/Bitcointalk.png[/img]