[SOLVED] Weird texture problem

[technologist]

Hello! I am very new to these tools, i just installed them today. I tried to make a simple wall according to tutorial videos but my wall looks weird. The texture of it is completely black even if i use lights. Also when i rotates the camera it shows misplaced and strange textures. Here a few pics so you can see what i mean. I would appreciate some help, preferable using simple, ordinary words, because i'm not english and i'm not a pro developer either. Thanks.