If u are new and dont know anything about the Game u should build an Deck that is easy to play, that means make a Deck with all Cards of the same element(for beginners Fire,Ice). Do ur Deck from the low using Units to High using units that means if u have a one Sphere Monster do it in front of ur Deck for exemple (1,1,2,2,3,3,4,4,1S,2S,4S,) 1=one Sphere 2=two Sphere 3=three Sphere 4=four Sphere 1S= one Sphere Spell 2S=two Sphere Spell 4S=four Sphere Spell. Sry if there are some uncorrect Words i am not the best at English i am Just learning right now