part one.
are you a qualified engineer, or a bike mechanic with decades of experience?
no?
then quit trying to second guess things you know little or nothing about.

part 2
that is a large BMX frewwheel.. put the cover back in it before things fall out, ok?
take the wheel to a good bike shop that deals with BMX bikes frequently.. they will have that rather rare freewheel remover tool.
PS.. those things love to get stuck on hubs, all too often... a wrench and sweat may not easily remove it, and the tool you find may break.
typical cost to get that freewheel off is 5 to 10 bucks... much less than a proper freewheel tool and a huge bench vise or air gun/compressor/socket.

good luck