Welcome to the REAL game :)
For me the graphics ARE awesome but its the PHYSICS that really make the game, it really is the most realistic golf game ever invented.
Steep learning curve here for sure though shouldn't be as steep for someone really good at another game similiar, but there are lots of little nuances here you wont find anywhere else, some are pretty tricky too but they all make sense.
Check the putting tips and Chip and Pitch tips over there ------------->>>>>
Those are a HUGE help so you dont get too frustrated too fast.
Once you got a handle on most things you might notice the odd shots that deviate, some even wildly, this will be mostly due to the low accuracy of the free clubs, better clubs have much less of this effect.
Happy hitting