Fobby, first get your green speed calculations sorted, until you do that you'll have problems. Secondly, try putting from the reverse angle as you see the line much better than from the straight on view (it will take a while getting used to it but it pays off), remember the drops and rises in the green convert to + or - a foot for every inch of the rise/drop, in regard to breaks on putts - the moving dots show you the direction of the break and the faster they're moving the more break there is in the putt, lastly just practice as much as you can as that's the only way you'll improve
one more thing, when I first played on PC and the early days of mobile I used to move the cursor to where I thought the break was but relying on hitting the ding consistently brings extra pressure so try the off ding method and you'll soon realise how far you have to miss the ding line