what's a good wordpress coding philosophy?

Hi

I’m new to WP… What’s a good philosophy for where to put content that you want the user to be able to update via Admin, but it requires html that you don’t want to change or have the user deal with?

Eg, content that goes in a table, or content of varying formats but all on the same post or page.

I would rather they not have to use the html tab in the Post/Page editor, and certainly not have to edit a template file.

The Visual tab on the post/page editor isn’t sufficient.

I considered creating custom fields, but I think that would likely just add complexity in the long run.

Another idea is just having them use div’s with “standard” id’s for css – eg “about_01” or “contact_01”.

Another concern is that if I go with templates, then I end up with several of them – About, Contact, News, Reels.

Any ideas? Am I making this too complicated (a habit of mine…)?

Thanks