Well, entering Mastodon in the search bar of a search engine today shows that it’s even easier than it was during the big Twitter exodus. The first link is mastodon.social. Clicking that lands you on a page where Create an account is highlighted in blue. From there, it’s the standard signup process everyone is used to.

Edit: Rewrote the comment to focus on the actual flow today rather than anything speculative.

That may be true for someone just looking to sign up with no help, but if they come across a guide or if their friend helps them, then it’s easy.

Is there any relation between Bluesky and Dorsey now? Does he own any of it?

They did, but it’s nothing huge.

Mastodon allows you to transfer your followers when you migrate, so it’s not a big deal if you change your mind about the first instance you had chosen.