What are the top rated interior upgrades for a Buick Enclave?

I just bought this used 2018 Buick Enclave and honestly its way more plain inside than I thought it would be. I feel kinda stupid because I spent all this money and now the seats look kinda worn out and the lighting is just so dim and yellow and it just feels old. I tried looking online for stuff to fix it up but everything I find is like for mechanics or people who know how to take cars apart and I have literally zero experience with that stuff. Its really frustrating because I just want it to look better but I dont even know what the parts are called or if I can even install them without ruining the car.

So I was thinking maybe I could just buy some stuff to make it look nicer inside but then I saw things about ambient lighting and custom floor liners and dash kits and now my brain is just melting. My logic was that I could just swap some things out but I dont want to rip the car apart. I have about 500 dollars set aside for this because we are supposed to drive down to Florida for vacation in three weeks and I really want it to feel more fancy for the long drive. Are there things I can actually do myself without breaking anything? Like what are the top things people actually buy for these that are easy to put in? I am so lost...