It should be noted that, at least for now, account migration can only go one way. That is, from the main Bluesky PDS to an external one. According to the documentation on account migration[0], they plan to enable incoming migrations at some point in the future, but there's no timeline.
I'm sure a big reason for this the possibility for abuse, since "migrating" an account is a different action than simply "creating" a new one
Depending on when you tried things might be much better now. Moving accounts can be done in a couple of simple clicks. You might have issues with your history, which stays behind because cool URIs don't change.
Yes, Bluesky is more centralized, but I feel like it is decentralized in the ways that matter for a Twitter/X Alternative use case :
- Self hosting of data, easy migration - Automatic verification via DNS - Custom feeds, Custom moderation, but you can still use the official ones