well... the first thing you do is buy a IR filter for your camera (they look opaque) then you put it in front of your camera and take the picture...
you can't make a IR photo from a regular one... even with heavy editing, your results will look fake and contrived...
you can take a tv remote and point it at your camera (and push a button of course) and take a picture... if you can see the beam on the picture (you don't need an IR filter to do this), then your camera can take IR pictures. if you can't see the beam, then your cameras anti-IR filtration is too robust.
what makes IR images unique (and not really post-processing friendly to fake) is the way IR light works off objects... like plants and such...