The 21-year-old completed his move to the Scottish giants on Sunday.
He will work under Liverpool legend Steven Gerard and former Reds' coach Michael Beale at Ibrox.
"Last season was a disappointing year. I made my debut against Bayern Munich at the Allianz Arena [for Freiburg] and was involved in a promotion chase with Bristol City, so I did take a lot away from last season," Kent said.
"On a personal level, I would like to get a lot of game time this year. I think I have to prove a lot of people wrong from last season, and it is a chance to add numbers to my game - so to get a lot of assists and goals.
"I want to get back to enjoying my football again."