how do i change my icloud account without needing to access the my old icloud[NEED HELP]

I've been trying to figure it out for hours now, it's almost morning now.

so to shorten it my problems are that i can't access my old icloud account and i want to change it.

why i can't access? its because im stupid that i used a password i can't remember.

why not use "password retrieval system"? it doesn't say which one of my email will recieve the retrieval verification mail.

i did the the "use your new appleID's password" to access my icloud and didnt work.

pls help me.