[BroJoeK]

familyop: "There’s an image of what the monkey was said to look like here."

Not monkeys, great apes.
Here are other images:


familyop: "Did sometimes walking on two legs make it human?"

Not humans -- not homo sapiens, not even the genus homo -- i.e., Australopithecus, Homo Erectus, Homo Neanderthalus, etc. -- but potentially hominins, meaning ancestors back to the point of divergence from other great ape species.

[SunkenCiv]

Thanks BroJoeK.