When you buy the game, soon you want to get your first DEC and level up to start opening your chests, but you notice that the DEC gain at the beginning of the game is small, you only earn 1 chest per day, and that can discourage early adventurers.
Good to start off right without spending too much money is to keep an eye on the day that ends each season... this day is the most important... this is the day you need to win to get a bigger prize pool.. so at the beginning, play .. I know it can be frustrating, but play, without worrying about losing or winning... but be careful not to drop your DEC win rate too much, play around 25 games a day.... Daily quest... and earn little.. but earn dec.. when you get to the day that the season ends, grab your DEC and rent cards! the best you can get. they serve to increase your power and maybe you can even get a league above your maximum... and good luck