@MobileSuitSonic Okay, I am going to start at the beginning to help you work with this map. From what I hear, this is supposed to be a place that used to be important, but is now, ruins. First of all, where is the water coming from, you have a waterfall, but it's only a small dinky pond. You could decrease the cracks a bit, have parts that are not broken, with dark patches. As for your cliff problem, increase the surface of the the grass area, add rocks, bits of grass, tall grass, dirt is another good one and you could increase the pond, so it looks like it's coming from somewhere.
I suggest googling various games from the old NES era to games of today to see how they accomplished working with limitations. I don't suggest copying those maps, but they are interesting study tools to give you ideas. But step one, you don't suck, you lack experience, which is okay. It means you'll improve and get better with a little bit of hard work, and determination.