Manufacturing a handheld gaming computer (console)

A handheld computer (think Steam Deck, Aya Neo, etc...).

I require support with the following:

* Designing PCB (motherboard)
* Designing PCB (controller) that will be integrated to the device
* Designing game controller (triggers, analog sticks)
* Designing outer shell of the console
* Coding if possible (program creation - low priority at the moment)
* Compiling list of required parts for this project to be created to be sent to a manufacturer
* SME to guide me through any extra requirements

The specifications of the desired specifications of the device is as follows:

* OS: Windows 11
* Processor: AMD 6000 series with integrated GPU
* Batteries: 40WH battery
* Integrated Controller (analog sticks, trigger buttons, d-pad and extra buttons that we will discuss if required)
* Bluetooth
* Wifi
* SD Card Slot
* SSD Memory
* Other PC parts as required (i.e. RAM)