As far as tournaments go (besides RG's and Brackets), there is only one tournament per week that pays credits.
Harder or easier? For a newbie, it would be harder. It took me a while to get used to it. The putting dots don't move accordingly, and you pretty much have to over-compensate for breaks, and...hope for the best.
To see how the new folks get good scores. Log out, clear everything (cookies, cache, adobe cache, etc). Open the game client, and play as a guest. You can do nothing wrong. Very easy to putt from anywhere on any green and 90% will go in.
Once WGT brings more options to the Mobile, I think it'll be great. It will never be what the PC version is, and there will never be a VT or U.S. Open win via mobile.
I play it semi-regularly (once or twice week), and enjoy it. It's different, so maybe it's just that it feels like playing a new golf game, although it's still WGT and same courses we have here.
The meter is always smooth. Never jumps or jerks (thanks to not having to deal with flash).
With that said, the Mobile version is still in it's infancy, and will definitely be the best golf sim on a mobile platform (already is, actually).
Here's a look at Congressional B9 on Mobile (also have Bandon VT, and BP F9 mobile videos) Click the title to watch it on You Tube. Might be easier to see.