As others have pointed out, salvation (as a Christian would understand it) isn’t a Jewish concept - from experience, I’d suggest that it’s important, when looking at other religions, to understand that you can’t expect them to ‘work’ the same way as your own. Core ideas and foci can be very, very different.
Simplifying things (hugely), Judaism isn’t a religion centred on correct ‘belief’ (orthodoxy) but on correct ‘action’ (orthopraxy - Orthodox Jews are Orthoprax Jews) - Judaism doesn’t have ‘Law’, Judaism is ‘Law’.
When you read your New Testament, you find a peripatetic teacher (rabbi) called Jesus wandering around rowing with other rabbis about the Law and its interpretation. A lot of his arguments were not particularly original from a Jewish perspective - they’re about how to live an ethical life and Judaism could be described as a very, very long row about just what that means. That is the focus of Judaism, the question of what happens after death isn’t a major theme of the Torah or the Tanakh (the OT to you) so it’s not a major Jewish theme.
So, if you ask what happens after death, we’re pretty vague on the subject, we have hope for a ‘World to Come’.
Well, what about everybody else? Since your ancestors didn’t sign up for the ‘Covenant’, you get off lightly. No reason you have less hope for the ‘World to Come’ than Jews, you don’t even have indulge in the OCD as religion () as we do (it helps to think of it as constantly bumping into God).
As to the ‘Noahide covenant’, you can look that up easily, just think of it as the basic rules of a civilised social life (and non-Jews are just as adept at creating libraries’ full of interpretation - and rowing about it - as we are).