Remove (or hide) main content text editor

You mean the normal WordPress editor? Why don’t you use that one as your ‘first’ block?

You could also use CSS by enqueue-ing your script in the admin panel (https://codex.www.ads-software.com/Plugin_API/Action_Reference/admin_enqueue_scripts).

Correct, I would like to hide the default editor which appears at the top. I could use it as the first block, but I believe hiding it at least with some CSS would be a better solution. Why? With your plugin I’m able to name each block, which is fantastic, so the client knows exactly what the content is within each block when in Edit Page mode. Since the default editor doesn’t have any sort of label/reference, it isn’t ideal.

Thank you for the link. Unfortunately it’s out of my scope.

You’re right about usability for the client. By enqueue-ing your scripts (just like you should do in the front-end), you can simply add your own stylesheet to the admin area.

If you need some more explanation you can look at this: https://wp.tutsplus.com/tutorials/the-ins-and-outs-of-the-enqueue-script-for-wordpress-themes-and-plugins/

Closing this.