I have been experimenting with different settings of Light baking (samples, resolution, etc) but I am not able to get a proper light bake in my scene. Everything looks so unprofessional, and I don’t know what to do about it.
You better deactivate AO and enable Skylight. You can also set Samples to 200 or higher to get a cleaner result. Lightmap resolution can be back down to 75.