importing a blender model amd making it look the same

i am certainly not good with blender, nor i realy try to be good. but sometimes i find i do somethings that dont look half bad. so naturaly i try importing it to unity, and that is when it starts to look terrible. Mainly because of the materials. if i got a reflective material in blender, in unity it does not reflect anything and such (this is the least of my problems, i have had materials only being seen from the inside) i am not sure what settings i have to adjust, or if its in blender or unity. so if someone has any tips, tricks, tutorials, whatever, i woud find it very useful.

i apreciate all you help.