This'll be a tough one, If your not familiar even with vertices will have a hard time explaining things, unless we start from the most basic.. I suggest you read some tutorials for blender the basic ones.. I believe there are some that explains the stuff like vertices, edges, face, mesh etc.. If you get familiar with this then it'll be a lot easier to discuss UV mapping.
Patience bro.. No one learns this sort of things overnight, I had hard times with this things before(and til now actualy) and It never gets easier.. theres always a lot to learn, but that's when it gets fun