Nothing is worse than punching every key on your keyboard hoping you will get the right one
At level 5, you are going to get a whole new set of skills, and you may want Ain kinah to save your points to train up those skills rather than the more basic ones you get at the start. Again, this depends upon your class, so the best thing to do is to read about what skills and specie.
So go ahead and find a blue Mob and enter into combat with it. The first five levels are a good tie to experiment with different combat styles and spell combinations, because you don't lose anything when you die.
Say to yourself F6 over and over again until it becomes second nature, because that's the button you need to hit to start attacking something and it is not at all intuitive. Nothing is worse than punching every key on your keyboard hoping you will get the right one while some tiny skeleton bashes you over the head with a club.
You should level pretty fast for the first few levels. Make sure you go back to your trainer after you level, because he may have a new quest for you. However, think carefully before you actually train up any of your skill points. Once you use a point, you can never get it back.