Unsure, I understand your request for ideas, you are asking for reality after having suffered from the JW fantasy world. You are searching for the guidelines for correct beliefs and that is where the problem lies because having "a religious belief" is a cultural thing, it is not a truthful or factual thing.
I agree with Anders above; what ifs only beg more what ifs. What you do need to do is to distinguish between "belief" and "knowledge".
Instead I suggest you try only "believing" things which have factual or testable evidence for their existence. If a belief is not testable (like "God is love") then don't waste your time on it.
By this criterion "salvation" becomes only a slogan of a religious doctrine, it cannot be tested, it's propaganda, it's a distraction from the world of reality.
Perhaps you are afraid to be yourself? Try it and learn what it is to be a mature human with free choices-- you are not a pawn in a religious lottery, you have every right to navigate your own course through life. You need not be beholden to invisible spirits which are unknowable-- try shaking off those superstitions my friend and get a grip on the real world-- learn critical thinking!.