convince of (something)
To cause someone to believe that something is true. A noun or pronoun can be used between "convince" and "of." You have no experience in as a receptionist, so good luck convincing them of your qualifications for this job. You'll have a hard time convincing me of that.
convince someone of something
to persuade someone that something is true. You will never convince me of what you say. I will probably convince myself of the need to find a better job.