YU GI OH DECK CONSTRUCTION?

i am a yu gi oh fan and i need 2 make a deck but i am new so i don't have much idea.what basically i want 2 know is how many number of traps cards ,magic cards,normal monsters(that require no tributes) and 1 tribute monsters and 2 tribute monsters should i keep in my deck.also i am thinking of making dark magician beat-down deck so suggest some cards,also should i keep magician of black chaos in that deck.