I found this post to be a clear and reasonable-sounding articulation of one of the main arguments for there being catastrophic risk from AI development. It helped me with my own thinking to an extent. I think it has a lot of shareability value.
I think https://www.alignmentforum.org/posts/TATWqHvxKEpL34yKz/intelligence-or-evolution is somewhat related in case you haven't seen it.
Let me know when you can receive donations via a UK charity.