Also note about exporters: The adage "if you build it, they will come" has to be taken in consideration. People don't use console exporters for Construct because there's only 1 (Xbox One) and the only thing I've heard about that it is, the framerate/performance is abysmal. I don't think it's fair to say: people don't use a low quality thing so therefore why would we invest in other similar things? I'm not suggesting native exporters, but I would love any kind of help on how I could take a path to porting to console on my own.
Well you say it yourself, you have absolutely no idea how/what to do..
You need to port your js into c++. This is what the companies can help you with.
Then you can do the release on your own if you believe you can, or let them help you with that as well. It is a lot of knowledge, which they have gathered for many years. But you request tutorials on how to convert js into and c++ and guides how to release for every platform...? It is a lot you ask for