TKD is very impractical for fighting because it relies mostly on kicking. Kicking is also very dangerous, as there is too much power in many kicks to block. I've broken both my hands trying to stop kicks. Most martial arts are incredibly boring, as you spend most of your time kicking and punching into air. If you are serious about it, I'd take Shotokan Karat because it is slightly more practical than TKD because it involves more punching than kicking.