Just about everyone at this point has tried out advertising on Facebook and Google, but far fewer people have ever done anything with Pinterest, which only introduced sponsored content within the last two years. There are positives and negatives to this situation, because Pinterest may represent something of an uncharted territory. On the one hand, there is a wealth of unexplored potential on the site, but on the other hand, there is not a lot of information for those advertisers who are just getting started.
The key to succeeding on Pinterest is to apply what you have learned advertising elsewhere on the Internet without ever becoming beholden to precepts. Sure, the copy and the images that worked on Facebook could work on Pinterest as well, but there is no guarantee. The venue is different, the audience is different, and for those reasons, you need to be different too. If something is working elsewhere but not on Pinterest, be quick to change. Experiment. Do some research regarding who is using Pinterest and to what they may respond. From there you can make some informed decisions.
Pinterest need not be scary if you are just starting out. If you are still hesitant, before you actually purchase any ad space, create an account and do some browsing. Get to know the lay of the land and figure out how your marketing strategies to this point do and do not apply.