In this site, are they information about how to create an operative system Linux based? Because I've searched but I haven't found it (I'm very bad at searching...).
There is (almost?) no information here for using Linux as the basis of a new OS - it'd be a massive amount of work for volunteers to act as the "documentation team" for everyone's kernels (Linux, FreeBSD, OpenBSD, Hiaku's kernel, etc). If you want to use an existing project's kernel, then you'd need to get information from that project's developers.
Most people here want to write their own kernel (for their own OS), so most of the information on the wiki and forums is intended for that.