Get the RIDE 3 Season Pass (the DLC adds incredible tracks like Macau). Plug in your controller. Turn off the in-game music. And just ride.
If you are looking for a hardcore simulation, RiMS Racing or GP Bikes are better. However, if you want a where you collect bikes and customize their appearance, RIDE 3 on PC is the peak of the series before RIDE 4 introduced much harder, more punishing wet-weather physics. RIDE 3 -PC-
It is the closest thing to a "Forza Horizon for motorcycles" that currently exists on PC. Get the RIDE 3 Season Pass (the DLC