I had the proposal to make a post with a photo with a careful composition and perfect light, explaining why and how it was taken, both technically and creatively.

I think it's a great idea. Any educational materials are extremely useful, especially if they are written by experienced professionals.

On the other hand, if you plan some kind of activity for the Steem team, I'd love to be able to collaborate on the project.

Tomorrow I will write a report and I will write a proposal in it. Let's see if the Steemit team responds to this offer. If so, then you will have the opportunity to work :)