Dude, they lock you in Russia up if you protest too much. Russia is a full-blown dictatorship now with Internet censorship, state-operated propaganda and other bells'n'whistles.
There is people protesting in Russia right now, no matter the risks, I don't see the harm in trying to increase their numbers.
Also, 100% of the media is spinning the "we're liberating Ukraine from the Nazis" take, and unless you spend very considerable effort doing your own research, you just won't find a single information source telling you otherwise.
And if you get anywhere close to organizing a protest with a non-trivial number of participants. They will figure out who's in charge, and will put you behind bars as a warning to others.
That, and people generally don't trust each other, don't trust the system, and are mostly busy trying to survive, find cheap food, and not get caught in a crossfire.