Hi and Welcome !
Start here >
LimeWire FAQ and User Guide
Be sure to have a look around these forums...
Just about every problem has been answered already and you may get answers to any questions you may have without having to post !
Use the 'Search' button on the upper-right of the forums pages...
I don't mean you shouldn't post !!!
Only that sometimes it may get you the answer(s) a lot quicker !
Have fun !
btw - You don't really need the Pro version... It's not that different... and you might as well practice a bit with the free version first !