But how do you start a proletarian revolution?

It's all well and good to say "this collective action would change the bad status quo", but even if you're 100% correct, unless you can point to ways to work toward said collective action, it's still pretty useless. You're not actually helping to change the bad status quo.

History shows that a revolution can only be started by a group of potential elites who hope to displace the current elites.