I suggest trying Obsidian for WYSIWYG markdown editing. It beats heck out of typing it raw and eliminates that cognitive load.
In the worst case, the barrier to entry and exit are pretty low.
First you can switch from WYSIWYG to text editor instantly.
Then you have an outline where you can manipulate your “markdown blocks” [i.e title and its content] by drag n drop. Or extract a “markdown block” as a new note, and leave a reference where it originally was extracted from.
And then [the killing feature], it displays the content of a link, web link or internal link, as a [kind of] iframe, if you prepend a ! to the link.