Make sure that the crown is well screwed.
Place it overnight in some warm water with some dish washing liquid.
In the morning, the bezel shall turn easily,all grit undrneath will be disolved.
Put a bit of tooth paste on a piece of cotton and rub the ( acrylic) crystal. All scratches will be off. The crystal will clear and shine.
You can do the same polishing ( tooth paste ) to the case and bracelet to have a clean shining watch.
For the movement, you need a good technician to clean, lubricate and adjust.
You are lucky to have such a watch !
