If you haven't moved any of your hotkeys yet autoattack is button 1, that will help you get to level 5 soon enough
[You must be logged in to view images. Log in or Register.]
if you're a caster then mem a spell and alt+1 will help you get to level 5 soon enough
[You must be logged in to view images. Log in or Register.]
Also make sure you know your way back to your local class trainer, thats going to be a necessity for a few levels. If you're a caster its also how you'll find your spell merchants.
right click a corpse to loot; ctrl s to sit, ctrl x to camp etc.
kill loot sell train/scribe repeat until 60
*edit* one more thing the /con system: factionwise you'll have to figure it out, but targeting or right clicking an NPC will tell you if its red, yellow, white, dark blue, light blue, or green. Don't go off the deep end and try to kill reds; yellows are pretty risky without gear too. Stick to white being the highest con you'll kill if you don't want to have to recover your corpse a lot, and of course greens give no xp.