“you can’t just marry anyone, it has to be your bashert”.
How can you ever know if you’ve chosen your bashert?
Had Leah imeinu chosen hers, she would have wound up married to eisav!
Maybe it’s better to look for someone she would admire and share similar values with, rather than an elusive idea of a zivug chosen min hashamayim.
I once heard that it’s a good segula for shidduchim to say az yashir with extra kavana.
I think there are also five specific tehillim recommended to be said for forty days. I don’t recall which ones, though. Maybe someone else does.