Yes, Yes. Spinning is best. Of course, it does require a fair amount of fitness to be able to flatten out the little hills and roll the rollers but you’ll be less tired and have fewer aches the next day. Learn to spin–Corrie
If you’re new to cycling, you may be pedaling at 50-70 rpm as you cruise flat roads. That is, turning the crank with a cadence that brings each foot around 50-70 times each minute.