My left hand fingers are not straight on the fretboard, indeed the calluses on the index and on the pinky are not in the centre of the fingertips, but I have them on the side of the fingertip, next to the nail. I tried to put my fingers perfectly straight on the fretboard but its a lot of efford. Is it so wrong if I cant press the frets with the very point of my fingers, and shall I correct this? Or it is irrelevant?