... The reason I wanted to learn combative Tai Chi is so I can learn flow with my appointment and was told that it is very useful in street fighting. ...
Street fighting eh?
IF this isn't a troll, ...
Boxing, Running, Judo, carry a weapon, live in a nice place.
Also, (in my opinion) don't do this ;
...I'd suggest visiting the school(s) that you're considering and asking the chief instructor these questions.
You ideally want independent and somewhat broad-based opinions.