Which one should l get into?

hi, lm a 48 year old male, l just got into the Martial arts (wing tun sun) a different style of kung fu l enjoy it but lm having a touch time focusing and paying attention to what the instructor is telling me cause sometimes l be having a lot of thing going on in my mind so to become a better student l have been thinking of getting into yoga or tai chi for those who have been practiceing martial arts for a long time which one should l get into so l could become a better student, thank - you for your help.