Hello Barbaranna and Welcome to the Fourm:
You are exactly the reason the Fourm is here. There are many of us here who are thrilled to give helpful advise to DIYers.
Now, about your paint. I would sand the rough spots off, wash it down with bleach, prime it with Kilz 2, and paint it with a mildew resistant, semigloss latex enamel. Proper ventilation is the biggest enemy of mildew and mould. Even Wal-Mart has those items. I have used hundreds of gallons of Wal-Mart paint and haven't had a complaint yet.
We are always here so, ring us up anytime.