I wanted to do the same last year, but interestingly nobody of my audience went off from X to mastodon, so I still have to post my film industry updates to X.
Similarily when WhatsApp changed its Terms of Use to be incompatible with german privacy laws (using whatsapp content for facebook profiling), I had to give up whatsapp as primary communication medium in the local club I'm leading. But nobody else went to Signal, so now we are back again with whatsapp. Nobody cares