I'm afraid this site is not the place for personal advice, but we can clear up some misconceptions on Jewish law.
Deuteronomy 24:1--4 clearly allows for divorce and remarriage. It says explicitly that Jane could get a divorce from Bob and then go and marry Joe. (She could not, however, subsequently divorce Joe and re-marry Bob; alternatively, if she was still married to Bob and cheated on him with Joe, then got a divorce, she may not marry Joe now. While both of those are prohibited, neither is "adultery" per se. But all of this is far beyond the scope of your question.) Thus, it would never be "adultery" for a woman to first get divorced from one man, then go meet and marry some other man.
Judaism makes it clear that divorce is allowed, for all sorts of reasons -- see Mishna Gittin 9:10, though just because it's allowed doesn't mean it's always the morally best thing to do. Sometimes, though, a couple is absolutely, fundamentally, what-were-they-thinking incompatible; one contemporary senior rabbinic authority tells that a mentor of his declared that a congratulatory toast is in order upon handling such a couple's divorce!
If a non-Jew chooses to identify with Judaism and study it, that's great, but a formal conversion ritual requires quite a few steps, the very first one is to go discuss the situation with a rabbi. Until there is a formal conversion, such a person would be considered non-Jewish -- despite all their good intentions -- and thus, a Jewish person would be prohibited from marrying them.
Some people unhappy with their non-Jewish faiths instead identify as Noahide -- i.e. they do and keep everything that Judaism expects non-Jews to keep, which does not require a conversion.
I hope this background information is helpful as you determine your path forward.