As far as I know there is no definitive guide for how to carry out a 'digital privacy reset' or 'digital rebirth' - but your LLM should be able to give you good instructions.
To do it properly, not only would you have to change all your logins and email accounts, but simultaneously start using a new computer and phone. Also, move home.
In other words: very hard to achieve. But I wonder if there is a set of achievable actions one can take that gets you to 'very good privacy'?
What about the records of your purchase of that new home? Do you need to again get a new bank? what about credit history
Of course, in ICE land, ditching your old identity is a disaster, because now you can't prove you're a citizen. Papers please.