Thanks for the recommendations, I knew about Shar but was defiantly interested to see if there were more options.
Leira seems like a pretty good pick but I'll keep digging around, I'll check out the deities related to trickery later today for sure.
Been using
https://forgottenrealms.fandom.com/wiki/Portal:Deities for most of my info so far.
Since your original patron was Selune, it seems appropriate that your TRUE patron would be Shar. Perhaps Shar tricked you into believing that you really worshipped Selune, hence performing an ultimate manipulation in her eyes. Would be a very interesting internal struggle and would fit the eternal struggle of that pantheon.

This is true and generally my first thought since its already in the game for EA. But you can never go wrong with multi-choices, if they decide to add more deities to the game would be interesting. Been listening to Ed Greenwood interviews recently and he talks about how everyone acknowledges the deities and you don't really specifically follow just one. For example if you go sailing you would pray to one deity while if your a farmer you would do another.
Still going through youtube vids for Ed though, could of misinterpreted it.