You will get an additional $500 for signing up under the above link. This game is not something a 6 year old could play - so if that's what you're expecting, don't click. It takes some time to learn and master.
Hints for your 1st day - follow the 1st day quests. They are all easy and you get $ for doing them. When in doubt, go into chat and ask for help.
I play this game anytime I'm bored at work (which is 5 days a week) lol