There are two main differing approaches vanceesharp,
Many who try to get the ball to hole with the closest length as possible, to leave it close for a tap in if missed, and there are others who use a little extra to take some break out of the putt and make sure it has enough length. It's your preference, and sometimes you have to change this approach depending on the hole/green.
If you don't already utilize it, try the 'reverse view' when putting, as it focuses the view at the cup and allows you to aim according to the break that is near the end of the putt, nearer the cup, when the ball is slowing and more susceptible to break.
Also, use the search box over there (→) on the right and search for putting tips, and you will get a lot of other information from a lot of other players who are far mow advanced than I !
You are already set up with a Rosa putter, so that isn't your issue - learn from thhose above you and practice practice, practice!
good luck,
VaHaLo