Ballroom has 2 categories: SMOOTH and RHYTHM.
SMOOTH dances progress counterclockwise around the floor: Waltz, Foxtrot, Tango, Viennese Waltz, Polka etc.
RHYTHM, also called 'Spot Dances' as they do not progress, but are danced in a small area. Rhythm includes all of the Swing Dances: East Coast, West Coast, Hustle and Carolina Shag. Rhythm also includes all of the Latin Dances: Cha Cha, Rumba, Salsa, Samba (which can progress too), Mambo, Merengue, Bachata, Bolero and Cumbia. Throw in Nightclub 2 step as it can be a spot dance or a bit progressive.
It's too many dances to learn at once, so I teach two per month, one from each category. In time you will learn them all.
Join in the fun!
And enjoy the journey.