I see this way too often here on Lemmy, so I want to post this. Starting a commune is legal in most countries. If you believe in communism, you can found a commune and show us all how great it is.
You lack money? Well, that is literally what stock markets and venture capitalists (capitalism) are created to solve. If you are ready for an IPO, you can sell shares to raise funds. If you are not, you can get Venture Capital in exchange for shares until you are ready for an IPO.
Getting rid of capitalism means you need to find a different way to obtain funding for new ventures. And if your system relies on government charity (some government board handing you money) or taking resources violently, than your system sucks.
Edit: I don’t mean that this is a replacement for full communist system. I mean this as a way to get some of the advantages while showing sceptics (like me) it can work and is better. A first step.
Did I say it always worked? IMO USA is definitely too capitalistic right now. There are things like healthcare, utilities, emergency services, infrastructure and many more that are better of government run (or as mentioned above, at least have government compete), either because it is impractical to have real competition in these areas or because they are so important it is better for them to be inefficient than cutting corners.
But making the leap from this to communism is ridiculous IMO. Gradual improvements to the system that we know works because we live in it is the way to go.