I do not see attempting to offer computer or electronics parts as a profitable online venture as there are already several companies that do a fairly decent job at that. I should know; I shop with them quite a bit. I do have some personal designs and schematics that are not available in the common market, however given how specific areas are addressed by them I do not see too much demand for them, as well as the fact that as soon as I post My creations online the danger of some large corporation stealing them or a repeat of the Micr()shaft - and - Lotus123 example spring immediately to mind.
Then there is the need to incorporate in another state if I can find one that has much kinder regulations for small start-ups than California. Delaware, perhaps? Yes, I know, the "Relocate!" cries will abound, but with My disabilities and travel restrictions that is really not a viable option for now or for the foreseeable future.
You have some knowledge of programming and could quickly learn to use html and css and php to develop and run your website. There is no reason to confine yourself to computer parts, you can sell anything (e.g., jewelry, pens, GNC-type supplements, etc. Everything is ‘pretty well covered’ — you can’t let that stop you. If you can figure out how to get Google to put you on their first search page, that’s all you need.