There is no need for a third party platform when you start out. Just spend a few hours going through the Facebook Blueprint program and you'll get a good idea on how to set things up. As you run ads, you'll eventually have more questions about the ads and how to get better results. Once you get to that point, look at bringing in an agency to help optimize things and manage your campaigns. Working with experts can help save you time and headaches. Remember you're spending your own money, so spending $100 and losing it because an ad isn't set up correctly is worse that spending $120 and having an agency ensure its being done correctly. Let me know if you need help, our agency (AdvertiseMint.com) specializes in Facebook and Instagram ads. - Brian