Got any pictures of it? Does it have electricity available? I mostly use mine for seed starting because our growing season here is way too short to wait till after first frost for growing anything (Ha, our last frost was about 2 weeks ago!). I use heat mats because that's way cheaper and easier than trying to keep the whole GH warm, plus the seeds start faster. But that means having electricity. You might want to get yourself a book or two on greenhouse gardening. One that is highly recommended (heh, heh, I have it, but haven't really read it) is Greenhouse Gardener's Companion by Shane Smith. It does have a lot of good information in it, particularly if you're just starting out. (By the time I got a copy, I already had LOTS of bad habits
) And it might give you some ideas for what to do with yours. See if your library has a copy.