I learned how to landscape from great streamers on Twitch xsorcier and chloessims. Twitch is great because you learn how to build in real time. I like a lot of the ground cover that came with Vampires and Island Living and Jungle Adventures to fill underneath trees and bushes. I also like putting some outdoor game play areas like a farming section, a kid section, a water section, an outdoor eating section, etc. After awhile it becomes really easy to fill the area. Also using the roof tool you can make a greenhouse if you wanted that doesn't count towards the tile limit tip I learned from Kippsidaisy.