If you have no employment history, get a job, any job, as soon as you graduate. While you're working look for a job in your field.
It's valuable to get some experience in the workplace before you enter your field. The workplace is a different world than school and there are many similarities between working professional jobs and menial jobs. Start getting accustomed to the workplace world as soon as possible.
If you happen to get a job in your field right after school consider yourself lucky, because it's unlikely.