If you spend some time searching Google for 'Miami Tai Chi' or 'Tai Chi Miami' or 'Tai Chi Schools Miami'... you should be able to find a local school.

Some terms to combine for your search:

Internal Martial arts
Schools
Florida
Miami
+
TaiChi
Tai Chi
Tai Chi Chuan
Taijqiuan
Taiji
Xing Yi
Xingyi
Hsing I
Pa Kua
Bagua
BaguaZang
Chi Kung
Qigong

Do that, and it should to get the ball rolling for ya.