Swapping professions is in the game. You exit to the character screen, pick a character of a different profession and re enter. Think of professions as a job. If you decide one day you want to be a lawyer, you start at the beginning and start training up to be a lawyer. If you decide after a few years when you're a competent lawyer that you really want to be an accountant, you would start from scratch as an accountant. For a multitude of reasons I'm not really going to get into at his moment, we aren't allowing people to be a Lawyer/Accountant/Doctor/Engineer, or let people flip careers on a daily basis - you have to pick one.
If you aren't sure what path you want to take just yet, I would advise NOT resetting your original character, just make a new one and experiment.