Please help a noob beanie out 😬😬

So I have never had to use html before and I am not sure what the tags or commands or whatever it’s called, to use are. The right ones compatible with this site that is. Also I am a bit of a technology dummy, sorry about that 🙃. Could you’ll please help me out with things like-
• How to insert or embed pictures or gifs in replies. Do the pictures have to be from an online source with a url? What if it’s on my internal folder? I have a photobucket account and it has many links to use like direct, html, IMG. Which one is the one to use?
• Share links, with and without thumbnails.
• Where do you’ll make gifs on?

Thanks to @mary assistance in the WWW post I learnt how to format like bold, italics, strikethrough,

blockquote

.
(Or let’s see if I did learn, once this gets posted)

And thanks to @waadmay and @sicarius I learnt about jumping to the parent comment. Very handy when replies are nearly in the 100s and you’ve been scrolling up all this while to reply. Click on the three dots on the top right on your comment –> click parent.

Are there any other tips there, you kind beanies will be willing to share?