I am installing this as we speak, very excited for the combat system in this game, looks so deep and interactive! Any advise for an incoming newbie?
Yes, the most important thing you can possibly do is
select the correct class on character creation 
!!!
Don't worry about picking the flavour of the month , they all have strenghts and weaknesses. The combat is very much skill based but ping plays a massive part although having said that with this being a proper EU release it's a non issue now.
I've played most classes upto level 20 and they are all good fun, I chose summoner as it's ranged, user friendly and people hate them! You get a pet that acts as a tank, you have some heals plenty of counters and a stealth skill that's a godsend.
Take your time leveling, gear is not as important as other MMo's, PvP is where the game excels. You don't need to worry about gear, you level your weapon like your character and armour is cosmetic.
If you have any Q's whilst playing just ask in here, I'm far from an expert but I understand the basics and glad to help out.
Shiro has a nice guide for combat mechanics for the Kung fu master, it's good for showing how it all works.. the animations are superb
there's tons of other vids for different classes
