First (posted) Item

[HellSniper]

Faces are Singlesided (unless you set them to be twosided) therefor faces have 2 sides.
Back and Front, Faces can be seen on the Front but not from the Back.
Select the faces and let Blender recalculate the Faces Insides/Outsides.
(Ctrl+N / Ctrl+Shift+N)

[NIII]

Faces are Singlesided (unless you set them to be twosided) therefor faces have 2 sides.
Back and Front, Faces can be seen on the Front but not from the Back.
Select the faces and let Blender recalculate the Faces Insides/Outsides.
(Ctrl+N / Ctrl+Shift+N)

Thank you so much <3

[e1o14]

About unwrapping: I rarely found any written tuts on it and if I did, they were really bad...
My advice would be: Watch 1 or 2 vids on unwrapping and then just try it out on your own, and make sure to use a test grid to see if you did a proper uvmap.