“Everything” is not an answer, it’s refusing to think of an answer. Please, try to actually think about what can a Russian person do to overthrow the government.
Oh, and let me give you some prerequisites:
1. You can’t use mass media to spread your message. Independent mass media are banned. There’re some leftover newspapers like Meduza and Novaya, but they’re niche and can be easily banned too.
2. Firearms are banned and it’s expensive to acquire one illegally. While rich person probably could arm, like, 10 people, it’s impossible to raise an army without massive funding.
3. You can’t rely on international organizations. When Navalny was jailed, Council of Europe had done precisely nothing to enforce ECHR decision to free him.
4. You can’t have visible leaders of opposition, because they would be murdered (like Nemtsov), jailed (like Navalny) or forced to leave the country (like Sobol).
5. 2% of the country population is serving in some kind of armed forces or law enforcement. They’re well paid, receive huge benefits and are ready to detain, torture and kill protestors. There’s a National Guard (340k people) which specifically exists for that purpose.
6. Elections are not working. They’re rigged, and opposition forces are banned from participating in them anyway. Every big party publicly supports war.
7. Mass protests on the scale of 100-200k don’t achieve anything. We don’t know if bigger protests would have any effect, but given [1] and [4] it’s unclear how to organize them. Protesting is illegal. Mass protests usefulness to influence the public opinion is limited, because media consistently underreports amount of people present.
Given that set of constraints: what would you do? I’m actually interested in your reply. If you think you would do better if you were Russian, what that “better” is?