help espx i dont understand it

please help me i followed the tuturials and everything i dowloaded a game but when i try to play it it ses missing render texture and no pixel format and when i download is it automaticly a iso or do i have to convert it or something??? thank if u can answer me

 

What are your system specs? Your graphics card might not be up to the task of running the emulator.

 

Maybe this is your problem

And the content of the .rar of the downloaded files isn't always an ISO, maybe files that has extension like .mds .mdf .ccd and mostly you don't need to convert it to play on ePSXe.