If you don't understand esports or game that you have been gambling on (Dota, CS:GO...), you will not earn any money. In that case it's much harder to bet on then regular sports like football etc...
That's why you needed to involved yourself from this games in order for you to get the right teams to bet your money, once you are already engaged with this games you'll soon then to find the advantages between opposing teams you will be able to classified which team is really good your edge will be much higher than those who are betting only out of luck.