Welcome to the forum. For pictures, you need to either use an image hosting site that will provide a URL that can be used in the advanced editor (two boxes with arrow pointing to the top-right on icon bar)/insert picture (tree icon)'s dialog. Google's pictures don't work (I've tried). Postimage or ImgBB are two sites that may be helpful. I use a different method. I self-host my images since I run a Linux computer with a web server and can provide my own link to paste. You can see that in my later mods. I started using this method when uploading images to the forum was no longer possible.

Whatever way you do it, it is nice to have pictures.