Raspberry Pi 5; A potential beginning for a new OS Dev at 16?

[WilliamIsMe1]

There are two things that have piqued my interest lately: Cyberdecks, and Operating System Development. What I was wondering was, is something like the raspberry pi 5 a good choice to do both of these? A cyberdeck will have a much more specific set of requirements to target, moving most checks for hardware functionality to be one time and one time only. Among those things, I will have full control over the software and be able to make full use of whatever stuff I push onto my cyberdeck. Is this a cool idea or a really stupid one?

Note: I have some experience in C, with basic understanding of advanced concepts such as arena allocation, direct memory writes, stack frames, linkers, ELF format, and some other small things. I program in Java mostly, making 3d games with LWJGL. I also know the bare minimum of assembly, or at least how to read it and somewhat get what I'm looking at. I'm yet to write more than basic addition or text output, though. I am also quite confused by the nature of interrupts, which I see as quite different from syscalls or the like. I use Linux Mint (btw) and have configured it in many ways to emulate MacOS, which is my favorite OS stylistically. I really like the idea of cyberdecks though.