Start with your fingers not touching the strings, then pick the first string with your index finger (i) with an upward motion (do not pull the string outwards). Your finger should move from the first finger joint below the knuckle as shown in the photo. The sound is produced by the fingertip and the nail striking the string simultaneously. Move only your fingers, not your hand. The i, m and a fingers usually pick the 1st, 2nd and 3rd strings.