Create ad on facebook for my bookkeeping services

My goal is to create an effective ad on Facebook to promote my bookkeeping services. My target audience consists of both small business owners and individuals who are looking for bookkeeping help. My main message is the affordability of my services without sacrificing quality. I have a budget of $100-$500 to spend on running the ad. I'm looking for someone who can help me create an engaging and effective ad on Facebook that will get my services in front of the right people while staying within my given budget.