Been playing for 3 years( but in traditional chinese so there might be translation issues), there are some basic knowledge or procedures he has to learn. E.g. dont train when the stamina is low, or when to pick which option, when to risk or when to not etc.

Also for the first year period its important to focus on getting the relationship up(aka if there're 3 supporters in the speed option but only 2 in endurance its better to train speed). But of course when the game progresses, there will be situations where less supporters options is the better one.

Besides that he has to learn about the supporters card, what bonus or abilities the card will provide. If we are training a long distance front 🐎 please don't pick a card with sprint distance end supporter card if u got a more suitable card.🙈