Yes, the editor needs to be clear before you select markdown or editor. Personally I think markdown is much better. In any case, you can upload your pictures using this service: https://postimage.org/

or if it's a GIF - use giphy

In any case, it would be better to include a picture, and have a parting word / signature at the end of it. Or else, it could look like a copy & paste job from some website. I have quite some articles on it, you can check them out if you wanna (i write random stuff as well lol so I got some feel for it, a few of them got voted quite handsomely)

Have fun!