I think you're on the right track. I am similar to you and not so skilled at low level OS development. There is an educational OS called PIOS from Yale's CS department with specific parallelism goals in mind, but it boots from metal so the code is a great resource. Here's the code: https://github.com/bford/PIOS
Also, you could try reading the Plan 9 source code.
(I would say the code is what you're after now, but in case you are interested in more of the theory of why it's designed that way, you can check out the research paper here: https://dedis.cs.yale.edu/2010/det/)
Also, you could try reading the Plan 9 source code.
(I would say the code is what you're after now, but in case you are interested in more of the theory of why it's designed that way, you can check out the research paper here: https://dedis.cs.yale.edu/2010/det/)