Mazel Tov!!!!
Sorry, I don’t know much about the topic, but I wanted to take the opportunity to wish you Mazel Tov!
I would think that the best thing would be to do what you’re comfortable with, since there probably are no real traditions involved, so you can create your own (obviously after checking with a Rav to make sure your plans are not against the Torah in any way).
It’s good that you are trying to find out what others do, but if you don’t find out anything or aren’t comfortable with what you hear others did, then you should feel free to do what you’re comfortable with.
I do remember one Russian couple I knew when I was young who had a second wedding. I did not attend, but my impression was that it was small. If I have a chance, maybe I’ll ask my mother if she remembers.
In any case, hatzlacha and mazel tov! 🙂