A few options:
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Get out. If you're one of the people fascists want dead, then surviving is in and of itself an act of resistance. Leave their domain. Go somewhere else. And live -- Just live. Build a life they can't touch.
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Organise and survive under their noses. It will not be easy, even if fascism has a short shelf life... It still does a lot of damage while it is active, and you and yours could end up as their target. Still, your best chance of surviving is by grouping up. Meet your neighbours, meet your local activists, get to know them, and start helping each other.
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Violence. But. It's not enough to just go spree killer. The violent response demands organisation. You could join an armed resistance group. Or, if you leave the country, if it comes to war, you could enlist to fight against your old nation. Lots of people did both in the forties.
If all you want is a place to get memes, hello, you're in the least bad place on the internet, the indie web/fediverse.
But to keep in touch with family members and friends, who are likely not techy people?
.... I guess you could get them on Signal?
I mostly talk to my folks through Telegram, but that's as far as I could take them (still consider it a win over using WhatsApp, because Telegram might be full of fascists but at least has an open API and a competent Linux client)