Remember that the roots of Everquest are very much embedded in the Role Playing world.
Many different aspects of the game will make more sense to you if you remember to look at it from this point of view.
From a role playing perspective you would choose the class and race you want to play, based on the role you imagine your self playing out over the lifetime of the character.
Also remember that this is a game about a never ending journey. There is no final objective or "boss" to kill or "title" to achieve, it is more about the ongoing development of your character.
So, you could start by asking yourself;
Do I want to play the role of a "good" or "evil" character, perhaps you would rather be more neutral?
(Your choice of god to worship might be influenced by wher you choose to be on the good - evil scale).
Do you want to play a role that is more "independant" able to get by without a lot of help from others?
Would you prefer to be more of a "supportive" type of character, someone who is more "caring" and prepared to help others in need.
Do you like the idea of close up combat, getting down and dirty duking it out in the front line?
Or, do you prefer the idea pf playing the part of someone who stands back out of the 'fray using their magic skills to play their part in the battle?
Would the role of someone who like to mess with other people's heads appeal to you, being able to manipulate thoughts and control minds?
If you decided that the "evil" path is the way for you, would the idea of being able to raise the dead to serve you as slaves be appealing?
Or, would being able to sneak around and hide out of sight of people around you, always attacking from behind to inflict the most harm, be more to your liking?
Etc, start off by thinking this way and you will find the combination of class and race that will give you great enjoyment.