Your country, and presumably you, are participating in boycotts. That's not a bad start, but that's not really direct action and doesn't answer how specifically you joining the military will directly help people in the US fight fascism. You could be in the streets, disrupting the logistics chain of corporations profiting from ICE. By your own logic, you're just sitting on your hands and are a weak person in the face of authoritarianism.
You also forgot to talk about what we should be doing differently.