Auto guiding is not possible with a Alt-Az Celestron fork mount (It was (is?) possible with the Meade Lx200 forks)
Without even considering a de-rotator (!) a good solid wedge and sturdy tripod/ pillar is the way to go.
(Having said that, taking images at a f10, 2000mm focal length is not the easiest way to start - a smaller refractor mounted piggy-back may be an easier "learning" solution.)
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