What I would change out the tyres first to something in the 28-32mm range. From there, just ride on the road and have a think about what you enjoy most. If you find yourself thinking about a bigger front chainring and wanting to go faster, an endurance framed road bike might be your jam. If you find yourself enjoying cruising more and smelling the roses, then something that can take fatter more comfortable tyres like a tourer or cyclocross bike might be better