There are mostly Dutchies on TSF, that's true. If you want to meet other people who speak english, it is better to use the regular version of JJ2 (and use the patch to upgrade it to v1.23).

As for your name: well, we can't help much there. If you think of something that you like yourself, just choose that. If you can't think of anything, just keep your real first name, like you're doing now. Aiko does that too, you know

Online strategies: all i can do is give you a few tips:

1) Never follow another player through a warp right away. Always wait at least a few seconds.
2) If you use seekers, make sure you're running while firing them. Otherwise, seekers are slow and easy to dodge. For the same reason, don't use them in large open areas.
3) Pepperspray and electroblaster powerups are worthless. The gun will still do only 1 damage.
4) The range of some guns will increase if you fire them while running.
5) Non-shooting moves (stomping, Jazz's uppercut, Spaz's sidekick, Lori's spin move) do 2 damage. Mix them in your game now and then, it's fun!
6) Don't use shields online, unless all the other players do it too. Most players consider the use of shields lame.
7) Collect every powerup you see, even if you already got it once. If you take it, other players can't.
8) Be sure to know where the carrots are in the level. You'll need them!
9) There's a bug in online CTF. If you kill a player who had stolen your flag, and he was still standing at the base he stole it from, he will respawn with the flag in his hands.
10) Don't play against players like Dizzy or Tyffie until you got some practice

I hope that may help you . Welcome to the Jazz 2 Community