I know a part-time photographer, but he doesn't specialize in wedding dresses. He does whatever he needs. In Shanghai, he can earn 6-8 thousand yuan a month, and it's not bad to do part-time work.
Personally, I think photography skills should be practiced first, and then I will take my own works one after another and take them to the studio for an interview.
It's really good and has a good reputation. Are you afraid of failing the interview? Skilled people need it everywhere.
Or in another way, see if the studio needs a photography assistant or something. Maybe this is a more direct way to contact the studio.
I hope I can help you.