Is it anyway possible to port Win32 applications into Linux?
The reason being is I have made a few applications in Win32 and I don't truly want to learn another API.
But I have heard of SDL but I'm not sure if it is worth it, since I heard Win32 is much faster.
Most Linux users eventually become familiar with Wine, a Windows compatibility subsystem for Linux.
You should be able to run your program unchanged on Linux under Wine.