I always panic when I've made a post and later realize or recognize something that I should have done differently.
Usually I forget to make the post under the proper community heading or something of that nature. I still don't know how to edit that, but if you know how then I would love to know.
Making your post readily available in the proper community will make all the difference in the world.
Today I noticed that I hadn't included the pictures that I wanted in my post and that can be easily remedied.
Just scroll to the bottom of your post and click the 3 dots in a row
they're just under the tags and next to where you give an upvote. I hope this helps some poor lost soul.