I gauge by what majority of the song might be.
It seems like a Merengue to be.
It needs to build, but didn't see anything bachata like in the beginning, maybe just do some slow moves that you do in bachata or rumba, then go into it.
A song is expressive, so adopt to whatever it throws at you and you'll have a better experience.
A partner appreciates when you have good musicality, then she knows you are listening.
If she's a good dancer, she's doing the same thing.
You learn something about yourself with what is working and what needs improving.
Have fun out there, a new song is a good challenge and listen on your own to as mant songs as possible, so you can tell how a song is arranged, and know how to dance it.