From what I can see, you pretty much built the top of the line PC. The only improvement you can do CPU wise is getting an EPYC.
What I would do to save some money is buy a Win 10 Pro Key from a website, they are like dirt cheap. I don't think giving 100$ to Microsoft for the Home version is worth it imo.
Here is what I've done - https://pcpartpicker.com/list/drFDQ6
Went with non rgb ram, but you can change it if you really want RGB. 2x32GB should be fine and if you see that you need more, just buy another set.