case closed, you are not a domestic terrorist threat if you follow Q anon, only if you engage in some type of illegal behavior regardless of any group you belong to. Q anon is not even a group, it's just a research discussion.
https://celebmagazine.com/qanon-fbi-terrorist-threat/
The FBI does not and cannot designate domestic terrorist groups. The FBI can never initiate an investigation based solely on an individual’s race, ethnicity, national origin, religion, or the exercise of First Amendment rights. When it comes to domestic terrorism, our investigations focus solely on the criminal activity of individuals—regardless of group membership—that appears to be intended to intimidate or coerce the civilian population or influence the policy of the government by intimidation or coercion. It’s important to note that membership in groups which espouse domestic extremist ideology is not illegal in and of itself—no matter how offensive their views might be to the majority of society. Membership in a group is not a sufficient basis for an investigation.