Guild Wars 2

I am currently looking for a guild. I have been playing about a month have 4 lvl 80,s and working on some others. I am still pretty new though still learning about mystic forge and such. I haven’t run any dungeons at all but would like to. I have tried 2 other guilds but quickly saw that having such large numbers you tend to get ignored quite a bit unless you are already part of the little clicks within the guild.

another question if I want to delete character can I reuse the name?

Im very new to game making my first character new. does any of the things when creating a character matter? like the college, and the other stuff you have to choose?

Is there anyone that can suggest a good server or all they all pretty much the same?

I am completely new to GW2. Im looking for a server american thats has healthy amount of pve and pvp both. If anyone could direct me to good server that would be great.