So, a while ago I've decided to make a portable wii, I'm naming it the Portiblii! and I need help with its internals. I'm going to order some 18650 3-6Ah batteries wired in 4P (with internal protection because safety first), a 5" AV display, boost converter and buck converters for the power displacement of the trimmed board itself, a DAC and class D audio amp, some cheap GC controller I can trim for the buttons, and various other things like an arduino battery level indicator and "smart circuit protector" to be ultra safe. But my issue is, am I doing it right? I think I have power sorted out just fine, the buck converters have adjustable voltage out from 1-(5?)V so thats all good. I am young, only 14 going on 15 as of now, but have been working with electronics and circuits for almost 3 years now. Any advice is very helpful! Also, if I am violating any rules please let me know! I just joined today and i think im not doing anything bad. Im just awaiting for money to come in and me to order some parts.