Creating a character is also very easy. Creating a character is about imagining a person that you would have fun playing with. There are however some limitations you will have on your character. You have to remember that you character will have been through Starfleet Academy and therefore acts within reasonable limits of a person that could pass the Academy. Also we cannot have have omnipotent characters either. Below are just a few things that you will need to think about when you create your character.

Full Name: Your name or whatever you want it to be.
Age: Your age will depend on your species, but keep in mind Academy time.
Species: Must be an ally to Starfleet, and cannot be all powerful.
Gender: Male, Female, Unisex?
Place of Birth: Where are you from?
Height: How tall are you?
Weight: How big are you?
Eyes: What color?
Skin: What color? May also depend on species.
Hair: What color?
Physical Description: What exactly do you look like?

Education: What kind of education did you get from the academy and before the academy?
Background: Tell us about yourself?
Skills: What are you good at? Should include Starfleet officer skills.
Medical History: Injuries or any thing else we should know.
Other: Anything to add at all?