Clean up the online footprint for someone that hires you to do so before they run for office. I don't remember every single web site I've every signed up for going back to when I started using the Internet, and neither can you.
Internet Archive likely renders that point moot, no? There a plenty of sites that index tweets outside of Twitter for example... at least there used to be
You can request them to take down personally identifying information about yourself. They respond quickly and seem to have someone employed to handle GDPR requests.