I do not know what a "proper mic "
A proper mic is one use for any professional audio work. It will almost certainly have an XLR output, which is easily converted to any other form of commonly used audio connection. For computers, the standard is the 1/8" mini plug.
there is no port for a microphone to input sound.
Well...I can only say that's a poorly designed computer. You may need to find a normal machine that has the nearly ubiquitous mic input.