Unreachable files

Hi :)

I've been trying to create my own content type and I've ran on some issues.

1st: Lack of information. Other than "Hello world" tutorial there are no more examples (or I couldn't find any) how to use some of available functions

and other stuff. Is there any simple example or someone who is developing something at the moment so that he/she can answer my quesions?

2nd: For some reason I cannot read .json files and use their content. Some of the things I've tried is

$.getJSON("./content/content.json"....

But I get an 404 error.

Can you please explain to me how should I read data from .json files?

I think I'm slowly losing my mind.

Have a nice day, Meri