He should learn how to handle his money well. He can start by limiting his budget in gambling. Take only few percentage on his salary. He can still even gamble with small amount of set budget. Atleast, this way, it will not hurt much his budget or salary. He can control his finances well. He can also get saving account to put his money. He can also try taking break from gambling. Try to make him realize what he is facing right know to enlighten himself. If you think these cannot help him, or he cannot help himself, then it's much better for him to seek professional help.
at least a novice gambler should know that he or she may lose their money in betting. because every novice gambler's thinking is to make money from gambling, not to get pleasure from the game.
Determining the allocation of funds is indeed important. it limits every gambler from getting involved in an addiction that could destroy his finances.
many beginners in gambling go crazy because they can't control themselves.