It is a direct drive hub motor. you will feel full resistance from the motor no matter what. if you want to freewheel without resisting you need to buy a hub motor with a freewheel clutch. so it can spin with no resistance. Before building a E bike is best to learn the basics. Like the difference between direct drive and non direct drive.
I do know spacing is important if you using disc brakes. Other main issue is ensuring proper placement of connector ends of being flushed of no slack. Flat head ends should be on bottome. If you using a weaker battery for the specs of controller, it will make a slight whining noise in beginning of throttle due to controller demanding more watts.