standard guide for removing DRM for kindle book using calibre

i have been using calibre but i haven't used drm removal plugin yet. Where can i find the tutorial/ guide for it. I have searched regarding this on reddit and youtube but it seems there isnt any standard tutorial for it (may be amazon keeps on changing the parameters for it)

-i have no kindle ereader but only the kindle app on android/ipad
-i can use access calibre for both windows and linux

Thanks for your inputs