You haven't played much so first thing is to get you distances worked out, google wgt putting and look at images.
You'll find a lot of scales for putting distances, they are quite simple to work out. On a standard speed green the 30 ft scale if you hit full power goes 30ft if you hit it one 10th along the power line it goes 3ft, 50% power goes 15 ft. So first thing download and print out a putter scale sheet.
Now look at the elevation of the hole, the rule of thumb is add or subtract one foot for every inch the hole is above or below the ball, obviously add a foot if it's uphill take away if its downhill. That will get you to the hole so it's a good idea to add a foot just to make sure you get past the hole, nothing worse than an online putt that stops short.
The easy practice putting green is good for getting distances right. The other two greens aren't that useful if you ask me, the hard one is so extreme it's not very useful for learning and the medium one has a lot of double breakers which is not what you'll be playing most of the time.
Now the hard bit, how far to aim to the side so the ball drops, that you'll have to either just use experience or one of the counting techniques or probably a combination of both.
When you have control over your distance search the forums for dot counting for advanced tips.