I’d think about it at a high level and then get more granular. What are your favorite riced screenshots? What parts of them particularly appeal to you? On the other hand, are there things about your setup that bother you? Then, take what you like and don’t like and let that guide you in customization.

I am pretty opinionated, so I care about changing little things. Examples of little things I tweaked when installing KDE recently:

• made the digital clock display on one line instead of two
• removed blur from lockscreen
• hid user info + switch user options from lockscreen

For me the rest of the visual adjustments came from picking color schemes, fonts, icons, and wallpapers I like.