Autocracy: Rules for Survival by Masha Gessen is an absolute must-read. I’ve been coming back to it every few weeks to regain my bearing.
In the face of the impulse to normalize, it is essential to maintain one’s capacity for shock. This will lead people to call you unreasonable and hysterical, and to accuse you of overreacting. It is no fun to be the only hysterical person in the room. Prepare yourself.