Advice: 85” QM9K

Disclaimer: this is my first high end tv. In my adult life I’ve just picked the biggest tv for $800-100 and went with that

I just purchase an 85” QM9K, it was the same price as the QM8K which was my original pick, so I figured I couldn’t go wrong.

I read a few posts and people said you need to mess with settings or update it to get it to perform. Curious if anyone has any advice for getting the best experience