Many of the answers to your questions are found in Jewish Tradition. Of course, the chrstian concept of “salvation” is alien to the Hebrew Bible, so it causes a lot of problems.
Which brings up a point that I have been trying to resolve for a while.
What, exactly, is the Jewish position on an afterlife? I’’ve known Jews who believed in reincarnation; Jews that believed when you’re dead, your’re dead; and various other beliefs, mainly of a New Age variety. Of course, I’ve known “Christians”, with the same ideas.
However, I find no support for any of this in the OT. So clarification of such is always appreciated.