Good advice from Bill^^^. I would also search youtube(as great as Bill's explanation is, seeing it in practice can make a big difference). Be forewarned, not every drummer is good at it, so judge what you see on youtube. You may learn how to do it well, and you may also learn how NOT to do it
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BTW, if you have any drum VI, you might call up various samples and use them as a comparison(assuming they sound good to you)