SkyTrak is one of a few different simulators that can used with JNPG. As you're not a real life golfer, it's understandable that simulators, SkyTrak, Trackman, GC2, etc. are foreign words. If using a PC with mouse and keyboard, you don't really need to concern yourself with simulators.
OGT is the Online Golf Tour that offers tournaments to its members.
https://simulation.onlinegolftour.net/
PGLS is the Perfect Golf Ladder System that also offers tournaments (not just a ladder) to its members.
http://pgls.golfladd.../pgls_intro.php
I especially like a utility offered at the PGLS website to help you obtain courses for the game. Read more about that here:
http://pgls.golfladd....php?f=2&t=1854
Dave's signature (presumably) provides a link to the GW (Golfer's World) site that also provides tournaments to players. I think this is provided through the PGLS site - you may already know this based on his posts!
I'll have a quick look for a putting tutorial (video). Essentially, you use a mouse click in the main view to aim the putt and then use the meter/swing method to put power to the putt, hopefully sinking the ball in the hole. Stimp comes into play - the higher the stimp, the faster the greens and the less power you need to advance the putt the required distance. Of course, the opposite if the case for slower greens (lower stimps). Stimp ranges from 8 to 14. For a level putt on a green with a stimp of 10, the power to make a 30 foot putt is approximately 9 o'clock on the meter. You will also need to adjust for uphill or downhill putts; uphill putts require more power and downhill putts require less power.