General ⇒ TeXStudio can't locate my .tex files

[thepersephonies]

Hi all!

I've just started working with LaTeX and for some reason I can't compile my documents nor preview them because texstudio can't locate them. Windows console also won't find them. I don't understand why...
I installed miketex, configurated texstudio to use pdflatex as its predefined compiler and searched through various pages on the internet and just can't find a solution. Any tips?

Thank you so much for any help!