Knowing how to still the mind, breath properly (do the exercises), and maintaining prolonged periods of disciplined intention are building blocks. After that,

Knowing how to still the mind, breath properly (do the exercises), and maintaining prolonged periods of disciplined intention are building blocks. After that, regular exercise (basic yoga might help with breathing and posture development for the meditation;) eat well (no refined sugar, cut out processed foods, etc.) After all of that, get your ass to sit the fcuk down and focus, consistently. It will come.