If I wanted to watch the anime for a bit as a more detailed explanation would that work? I remember that the Tales of Symphonia anime was close to the story of the game but changed several things and I'd rather not end up confused if this is also the case with ToA.
It seemed about 90% accurate to the game when I watched it. There were some altered scenes, some skipping, and it was overall much faster than the game. If you want a refresher watching it should be fine. Make sure you find a subtitled version if you can't understand Japanese.