In escalating order, start from where you're comfortable then advance from there:

Ensure the people around you aren't oblivious to what's going,on and if they're aware, then not just buying the administration's lies or taking their actions and statements at face value.

Protest to show widely that randomly kidnapping foreign leaders is not what average Americans approve of. Meet people that are open or ready to organize with you.

Forming mutual aid organizations to plan how to react if the federal government tries to come after you or your neighbours. Ex: if you run a business, lock the door at the first sign of ICE, like whistles, and refuse to allow entry without a warrant.

Boycot the supporters of the administration. The more co-ordinated and widespread, the more effect it will have. Hell, Canadians got Jim Beam's factory to shut down for a year.

Raise a strike fund and strategically withhold your labour. This, used well, might be the only thing needed to bring down this government so you wouldn't need to resort to anything further.

Use your knowledge and expertise to create parallel systems and infrastructure to the ones being abused by this administration. New communications networks, a new health organization that actually gives proper health advice, communal safety groups and welfare, research funds to replace those that the feds threaten, so on and so forth.

Raise a bail fund and plan civil disobedience. The action would involve things that aren't violent, but may or may not be illegal (or something that is legal now but declared illegal by the administration). The actions would be intended to slow down and obstruct the administration's priorities. Example: federal tax avoidance/objection, throwing your trash in front of a federal building in a way that just so happens to create a blockade, refusing to comply with policies you believe are unconstitutional.

Edit: wrote protest twice

Yes murder. That murderous fuck is going to get a lot of innocent people killed if someone doesn't start shooting fascists soon.