I would benefit from explaining it to me with the help of some pictures.
When I read this, I thought of the old saying "I don't have the time or the crayons to explain this to you.", but that's maybe just me being for a long time already on the forum (and other forums as well). Other users were definitely more patient and friendly to give you an ELI5...
How old are you? (You don't need to answer...)
There's a
HELP link at the top of a forum's page. Click on
Posting there. At the bottom of ths page, posting dialog icons and BBcode are explained, like here for embedding pictures

There's a sticky topic in
Beginners & Help,
Newbies - Read before posting, the first thing a bit down the post when "
More detailed information starts, is about to explain "I cannot post images?".
How did you miss this or even bothered to look around and read such obviously informative topics? Again: how old are you? (yadda, yadda...) --- Post less, read more!
Fresh from today by joker_josue:
New User Guide: How do I post images on the forum? ---
Oops, post edit: joker_josue was faster while I was writing this...
Now that your questions have been answered, you can lock this topic. (Forum search would've revealed a gazillion of newbie questions about picture posting, but forum search is either intimidating, cumbersome for newbies, not friendly experience especially for newbie and low ranked accounts, ...)