Hi u new player, i gonna answer u based on my own experience (i play this game since the very beginning).
I played a Shaolin to lvl60 on EU1, now i'm playing a Rg (lvl68 atm) on EU2.
1/ I played on both EU 1 and 2, and i feel EU1 is more populated, maybe coz it was the first server online in EU.
But if u want to reach competitive, choose EU2 coz there are less high powered players compared to EU1, so u would have a better chance to be on the top.
2/ For pvp, tangmen/wudang/Rg are cool.
- Tangmen has a 3sec stun!
- Wudang has healing, and very good combo coz of many existing sword skills.
- Royal guard has the best damage output overall.
3/ My heart goes to Rg, coz as i said they got the best dps. And PVE in this game means DPS!
4/ Try to lvl up ur character, ur school skill and school inner (try to get ASAP the 3rd one, which gives the best stats), if u can try to have at least Cold moon cloak (u could have this for the first top-up, even for 0,99euros), look at top players stuff to see how they are playing their character, read forums for guide and tips, u could eventually ask questions in game, players would mostly answer u, etc...
Good game to u, enjoy