Couple Newby Questions

[DurtiMonkeyToe]

I am very new to the game, a friend helped walk me through a few basic things but I am a bit confused on some.

As a caster (conjurer) When I try to attack something do I always have to press enter after I have selected my skill or is there a way to make it always automatticaly cast after I have selected the skill.

ie. press 2 (fire), press enter to use fire.....(seems a bit silly to have to confirm my choice after I have choosen it lol)

The second enter is to select your target, which is necessary when you are fighting multiple mobs.

I would like to become a healer, can I be a DD and a Healer or do I have to stick with just Healer?

You can be every job in the game, but not necessarily at the same time.

Is there a friends list?

Yes, it's in your menu.

What is the big green button for (AOE) do we have to decide if a skill should go single target or aoe? or is there another use for it?

You decided because if you AoE in the vicinity of a lot of mobs, they will all aggro you once they are hit by your AoE.