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The motor would only be a single motor, so you will need to be fairly accurate polar alignment. Polar alignment is difficult as there is no polar star bright enough for a 70mm to see, the way I do it is to use a compass and then use live view on the camera to see any drifting and re-adjust the mount a little when the image stays where it is.
Focal Length 900mm, you will notice a fair amount of drifting and will need to be quite accurate.
I use a couple of items to align without polar. Compass to get south and a level to get the EQ angle of my latitude. I have an IPhone application that also provides a variation is south alignment as well, usually only a couple of degs if I wish to get a more accurate reading.
Another application I use is Astro Photography Tool, for live view recording onto laptop and great for testing my drift as well. Only recently I have used the Focus mask which is brilliant for getting accurate focus.
One thing I forgot, to do very accurate focusing it is possible to manual focus but would be better with a motorised focuser.
Without getting too daunting, try the moon first should start rearing its head in the next few days and there is a lot of flexibility. Small steps and build on it as you go.
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