Dash from our Wiki team put together a great video showcasing the character selection screen, showing all the class and race combinations as well as a general overview of what each race is about. If you're thinking of rolling an alt soon or haven't even tried the game yet, check out his video below, the amount of choice is staggering when creating a character and hopefully Dash can make those choices a little easier for you!
Quote from Curse Gamepedia
When creating your character, you will start by choosing your faction (Exiles or Dominion), your race (Human, Aurin, Granok, and Mordesh for Exiles, and Cassian, Draken, Chua, and Mechari for Dominion) and the sex (Male or Female). Then, depending on your racial choice, you will be asked to choose your class, Warrior, Esper, Stalker, Spellslinger, Engineer and Medic. Finally, you will choose a path from Soldier, Explorer, Scientist or Settler.
You can customize the appearance of your character. Now we know that it will be possible to set cutting hair (and color), the eyes , the facial hair , the ears and attributes (also including horns for example) and skin color. According to the latest a system cursor was in place to give the features (face) that we want, but the developers did not want to go up to the choice of creating face "non-standard" and "disproportionate."