Why do you believe in it, do you approve it in theory or also in practice? I think a lot of people approve of anarchism in theory but rejects the possibility of it to be put in practice unless we live in an utopia.. which I don't think we do, unfortunately. Maybe techno-anarchism would be more practical? Technology is such badly regulated and ordinary people are punished harsher than corporate so I really think techno-anarchism deserves a lot more attention (not saying anarchism itself doesn't) I see a lot of people here are more knowledgeable than me so don't take my word so seriously, maybe I shouldn't be expressing my idiot thoughts on it, or maybe just embrace it and ask regardless of any shame I might get.
I'm not trying to be mean to anyone, just genuinely wanted to discuss with whoever is willing to chip in on the topic.
There are plenty of anarchist communities working in real life, so, yeah, it's viable. You can join an anarchist collective, or even start your own. These collectives are the reason life under capitalism is viable in a lot of countries. These collectives exists right now in your city, helping each other and the poor. You don't need permission from the oppressor to be an anarchist, just do it, stop subjugating yourself to the oppression, stop accepting it, normalizing it, and build the life you want with others. As others pointed out, anarchy is inside you first, it's not an external system, you decide to stop participating in violence. Anarchists then, tend to find each other and form communities. Be part of one, experience human life as it should, and become ungovernable.