@tes you can do into your profile settings and there is an "import/export" section that will let you download your account information.
The effective way, though, is to perform an account migration. You can find instructions on the docs.joinmastodon.org website.
Note that CISA is isn't a law enforcement agency and has a mission for improving security of critical infrastructure. The reason people are blocking is because it's being interpreted as tacit support for all the bad things the US government does.
There are some who misunderstand laws, like the 1st amendment, freedom of information act, and so on, as a reason to pile on, but those aren't legitimate arguments.
I do understand you not wanting to harm others. We share that. If you were to move to another instance, people seem to be liking Hachyderm.io. If you're looking or something that would take a stance against what we're doing, I likely recommend octodon.social. Mastodon.social or Mastodon.online area also good options when they reopen registrations.