7890yuiop

I feel like whenever I am browsing emacs content online there are still many topics for me to discover.

This will never not be the case.

My suggestions are:

• focus on addressing known pain points
• if something seems very popular, it might be worth trying to learn why and whether it could be beneficial to you as well
• if something else sounds super-interesting, take a look
• don't fret about not keeping abreast of everything -- it's almost certainly impractical

There is a thing which provides zsh completions. It's zsh. If that's what you're wanting, then maybe don't stop using it?

And in case the video doesn't say it:

Ediff has its own user manual: C-h i g (ediff)

Have you considered an org-capture template fitting your desired format?