How can I make a assistant in short... HELP

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I searched all over for a topic like this first so I thought this may be a good topic How would one go about making a assistant be it male or female also does the assistant have to be human can they be a robot or customized i'm curious as to what and how assistants are made lastly will someone will be willing to help me create a custom assistant any and all info will be apperciated

btw everyones assistant looks great