Comment by avmich
Presentations, including video ones. The ideas feel pretty clear in the head long before you can describe it in a manner which ideally could be a pleasure to watch. What tooling to use, how to work with all that, how to even plan the layout of words, scenes, images seems pretty puzzling, and solutions are like a slow walk in a dark room.
I'd recommend Beyond Bullet Points by B. Atkinson; it's a book about PowerPoint but teaches you how to synthesize presentations, including videos and in-person presentations.
As far as career upgrades, this book was decisive for me in making the lightbulb go off so I could share my vision with others and have them see it, too.