I tried. Mastodon attracts a pretty specific crowd in my experience though. Usually people with at least a certain interest in tech topics and the whole mood just felt a bit serious. I don't have high hopes for it to become mainstream enough to really be a serious competitor, because the barrier to entry literally has to be insanely low for that, for a lot of people.

I have two accounts on Twitter, one for work where I follow Englisch speaking people around my specific tech niche for work, some of those might be on Mastodon but not enough to make the move yet. And on my private account I basically have a purely German crowd that's been 50% random shitposting and chatting with each other and 50% political discourse. All of those decided to move to Bluesky and to cut the political discussions for a while. Now we're all just enjoying the few months of peace over there :-)