I am a bit busy with other projects and hoping to get permission to edit my posts, since the next is a very complex one about how I made this video, and there will be mistakes.

If I'm not mistaking you can edit your posts up to two or three days after the initial post.
If the post is that complex and large you could split it into multiple posts. First creating it in a word processor offers you grammar and typo checks. Even better would be to export that as a pdf. You can update the pdf with every change you make.