1- select your cube

2 - press tab key to go to the edit mode then press 3 to select faces

3 - select all of the faces

4 - right click and choose uv unwrap faces

5- click on unwrap

1- open uv editing tab ----> ( its on top of the screen )
your screen should be look like this -->


*note : if you not seeing the right window or you just see the right one you should make another window .

*note : if you not seeing the unwrapped cube then you have to select the faces on edit mode.

on the right side of your screen there is a panel click on red globe at the bottom

*note : at the first you should have material but if you not seeing anything press new to create one

1- under surface you see base color next to base color there is a yellow circle, click on it

1 - search for image texture and click on it



2- click on open one the new tab




3 - choose your file

*note : i have reference for you if you want to practice go to reference Section for that

now your screen should look like this







1- press z key ones and choose material preview

this is the result