Hey @[email protected], I looked it up, and there is an upcoming option to move your account in the Lemmy software release version 0.19 :

Users can now export their data (community follows, blocklists, profile settings), and import it again on another instance. This can be used for account migrations and also as a form of backup. The export format is designed to remain unchanged for a long time. You can make regular exports, and if the instance becomes unavailable, register a new account and import the data. This way you can continue using Lemmy seamlessly.

Note that this won’t export posts and comments. Right now lemmy.world is still using version .18.5 of the server software, and according to this announcement the admin team hasn’t upgraded because of stability concerns, which is understandable. But the export feature is coming here, Fyi. Hope this is helpful.