I need material creation tutorials

So im just starting out with ue4 and game development in general. Im wanting to know if anybody can link me some tutorials on how to create materials for different types of objects; ie, landscape, a metal, plants, water, or anything else i need. the one im particularly concerned right now with is landscape materials. I have a basic concept how to make a layer blend with the starter content but i want to know how to best set up materials from scratch with my own textures. Thanks in advance.