First, Why spoiling the catalog with pictures of T(D)rump(f)?
Now with the questions
>what're some subtle ways one could bring thoughts like ours into the general public's mind?
Ideological change is generational, introducing new ideas into people is very difficult, what you must do is to manipulate the ideas people already hold, have these ideas feel like they came up with them by themselves. This means no generic authoritarian fascism, at least in presentation.
>would they be specific to where one lives, or is there a catch-all way to advertise [...] some fashy-like ideas?
This is an issue in marketing, you must find an equilibrium between personalization and mass appeal. Personalized propaganda resonates better with people, but gives you a much smaller net to cast; mass propaganda is less powerful but can be applies to large groups of people. Propaganda should have more purposes outside of just propagating an idea, it should crystallize in something and is this something that will dictate how big your public is.
>but the coronavirus has limited the mass viewing appeal.
Throw away the romantic idea of posters and activism, at this moment the most powerful medium for propaganda is the internet. There is no reason to not start now.
>P.S. Caps Lock is your friend, if not then Shift is also a very friendly fellow
That place is still alive? My, Autism is powerful