Yea it’s super clear, I’ll be sending it to friends :)

For crossposting, if you’re using desktop then there should be a little button (looks like the copy button) which helps you cross post.

I prefer to just open each community and copy paste in the contents. The above method is only if you really care about having a little “crossposted to…” text on the post. Depending on the app or frontend, people might not even see that.