Depending on your seniority and title, working with diagrams may take a big chunk of your day-to-day work.

Here's a collection of diagram creation tools, so you could pick something that suits your needs. Some of these
projects are quite famous - others not so much. I personally found some
interesting things there. It's not guaranteed that I will use them, but
still.

Also, speaking of diagrams, I can recommend this talk
from FOSDEM 2023. It's not a super-entertaining one, but it has some
good suggestions on how to draw your diagrams. The talk itself if
wrapped into Kubernetes, but those suggestions are universal.

#diagrams