First time builder; help with parts list!

https://pcpartpicker.com/list/RD2KwY

Give some tips for my list please! I have never built a PC so i’m not exactly sure what to ask about specifically, any advice is helpful. I have a couple friends who are helping me and I’ve watched some videos and this is what I have come up with. Budget isn’t a huge issue, but based on my research I should never have trouble playing any games i’m interested in with the specs on the list so around $2600 is plenty for what I want to do with it.

I do have one specific question. I’m going to do liquid cooling and I have seen videos on tik tok of cool cables that light up and show the liquid flow. What are these called and do I buy them separately? Are they necessary or purely for aesthetics?

Again, any help is appreciated! If these are dumb questions please don’t be condescending! I am learning.