Hi i'm new to Final fantasy and i was wondering if i am doing good

i am just starting chapter 3

i have

Paine lvl 27 finshed warrior - in the middle of gunner
Rikku lvl 26 Finshed warrior - in the middle of Dark Mage
Yuna lvl 25 Singtress - was thinking about changing into dark Knight

i was wondering if i'm good for chapter 3 or am i getting slowly left
behind.. thanks

-Pained