It is perfectly legal for you to work in an office at 14, that does not mean anyone will hire you but they could.....
there are a number of jobs that you could do in a law office, the problem is most law offices business hours don't work well with the hours and days someone 14 or 15 can work....
Click on the following link for information about child labor laws such as the number of hours allowed, when you can work, what jobs you can do, and which states require a work permit for minors: http://www.youthrules.dol.gov
US Department of Labor
in general a minor 14 or older may be gainfully employed (work in a business location) such as an:
Amusement park, or
Gasoline service station (NOT in the garage area)
BUT due to the high unemployment rate at this time it is difficult for minors to get a job.........the jobs that use to be held by teens and retirees are now being taken by adults trying to support their families.........however it does look like things are getting MUCH BETTER for minors looking for work......
Fast-food and grocery stores are willing and able to train new employees but...
Minors tend to have many issues that affect their ability to work such as tardiness, absenteeism, and numerous schedule requests, poor work-ethic etcetera.
I am NOT implying you will have those issues but the fact that many your age do makes it more difficult for you to get an opportunity to prove your worth.
Most businesses are individually owned and operated so it is the owner’s policy and past experience with minors that will determine if they will hire you. Apply everywhere you can, the worse that can happen is they don't hire you.
Businesses such as Publix, Kroger's, Food Lion, Sonic, Chic-Fill-A, McDonald's, Winn-Dixie, Krystal's, Dairy Queen, and Burger King along with smaller local businesses that are in the same genre tend to hire those your age.
Remember just because they legally can hire you does NOT mean they have to hire you or they will hire you. A lot depends on the employment outlook in your area, and the past luck (good or bad) the employer has had employing minors.