Hello, yes, that's possible. However, I think that almost six hundred francs is too much for this TV. For example, the Philips 43PUS8507 is currently available from the competition for CHF 449. Then you have Dolby Vision, a VRR (if gaming is an issue for you) and of course the Ambilight. I'd go for that one.
Hello, I had a quick look at the manual. Yes, there is an ambient mode. However, due to the built-in VA panel, the quality of the displayed image depends strongly on the viewing angle. You should be aware of this.