I like Masodon but the user experience on Bluesky is easier and great block tools too. I don't mind Mastodon not being mainstream, it is kinda good to have niche parts of the net still.
Nice profile picture! Do you have any suggestions of content to find on Mastodon? I'm pretty new there and I can't find anything interesting when I open the app.
Try going to the home page of instances of accounts you like (or of instances that seem interesting) and browsing their federated feed (tap globe for "live feed" then hit "all"), you can discover tons that way.
As a general mastodon instance mas.to looks good and is a nice size with a good stable history.