I'm not from the US, so I may have get wrong, but didn't the Founding Fathers envision that people should be able to collectively rise up and overthrow a tyrant? Hence the right to keep and bear arms?

Of course, from a practical sense this does not seem possible, since the current US military, which a tyrant president would have direct control over, would be infinitely more powerful than a revolutionary group.

I don't know anything else apart from finding communities and mobilising with similar-minded people, there's power in numbers.

At the same time it feels pretty hopeless, even more when I noticed downvotes coming to my comment right after the day rose in the USA without any rebuttal, you're among people who actually support this and do not realise the path it's verging towards.