You're entering a highly competitive field. It will likely take more than a boosted Facebook fan page to earn success.
Facebook has plenty of information for those who want to make use of their paid advertising. I would advise making use of the resources they offer to learn what you need to do. They earn their profits from advertising, so it's to their benefit to make it as easy as possible to spend money with them.
You will want to make sure you set a budget. Decide how much money you're willing to spend. Decide what you consider a measure of success. And track everything to ensure you're getting the benefit you desire from the money you spend.
If you aren't getting the desired results, you'll need to make some changes. Unfortunately, nobody can tell you in advance what those changes will need to be, because we don't know in advance what you will be doing in the first place.
Just be aware that -- especially if you've never done digital advertising before -- it's likely you'll have to experiment for awhile before you start to get it right. Be sure you keep an eye on your budget so you don't spend all your cash reserves on your experiments and run out of funds before you have time to find what works for you.