How is the best way to start?
The best way is that you start with a character, where you know, if you want to be pure STR, or pure INT. A character with pure STR have to start with a Glavie, Blade or a Bow, because if you are pure strength special moves like fire, thunder or ice won't do damage. Just skill the moves from the Glavie, Blade or Bow. If you want to start with a pure INT, than take as a weapon Spear, Sword or a Bow, if you start to skill you do just damage with the special moves like Fire,Thunder and Ice, this moves will do a lot of damage.
What is the best Job in the Game?
In this game there isn't a good Job. There are three Jobs: Trader, Hunter and Thief. Every Job has good things and bad things.
Trader: The trader is somebody who get the most money, he buy a horse and goes from one City to the other, but be careful because the thief's are waiting for them, the want to kill them and steal every thing that you take with you. But a Hunter can help you to save you life.
Hunter: The hunter get no money from doing the Job. He just get the money from the trader. A hunter have to ask the trader for money if you help them. A hunter have to hunt the Thief's and save the traders.
Thief: A Thief is somebody who get the money from steal everything from the traders, he hunt them and take everything and sell it in the Thief City. That's the Way how the Thief's get money. But with the most traders are minimum 1 hunter. The best way to be a thief is that your friends are thief's too, because you can steal everything from the traders in a group.