"minarchism is the idea of minimizing or devolving the state for purposes such as police, millitary and courts"

Why would you do that, you would immediately be threatened, if not outright invaded, by the Capitalists. You're thinking in a vacuum only, without considering the material reality that would surround any nation with this 'ideology'.

"i think the state would be devolved to simply administration and welfare services."

That's not what the 'State' means, that's just governance in general. Not to mention that you would be unable to coerce any of the Bourgeoisie to the will of the Proletariat in any form. You wouldn't be able to seize the means of production at all; nationalization without State force is impossible, among other numerous issues. Without the oppression of the Bourgeoisie, through the use of the State, the Proletariat are at risk of oppression again by the Bourgeoisie.

We know what you're talking about, yet you keep reiterating as if we do not. My comrades here are trying to tell you that this is an ideological dead end, and instead redirect you to actually read Marx, Engels, Lenin, Stalin, etc. Not Wikipedia articles. Atleast read the Communist Manifesto, it is not that long and is possible to read- even with ADHD, which I suffer from heavily. It will atleast give you the bare basics.