What an incredible promise! If we lack wisdom all we have to do is ask God and He promises to give it to us. He will not scold us for asking, for He gives it out freely!
Jesus, I am asking You, now, for Your wisdom. You have promised that you will freely give it and I trust in that promise!
Ask Him sincerely which church is true and genuinely be open to the answer. Enjoy the trip.
I see you, JS ;)