Every beat should be at a point where you can practice in front of the mirror.
After a strong sense of rhythm, you can go online to find some simple and practical dance practice, or watch more MV and dance programs. You can watch Bao Er for MV, and Blackstone North Society for program. Although I am tired of those brain-dead girls, I can see all kinds of dances and their rehearsals.
You can go to Tudou and search for some videos of dance teaching.
In fact, rhythm is very important to dance, and then read more about it and practice in front of the mirror.
You don't have to go to dance class.