Rey used the force without knowing she was using it. Rey used it when she found ship parts that she traded for food in Ep. 7.
Like when Anakin discovered he was the first human who could pilot a pod and race them or fix things in Watto’s shop in Ep. 1.
Yes force sensitive people can do things in small or everyday ways but to fight someone somewhat experienced in the Dark side and beat them and move rocks around surprisingly even to herself is too much