Yea its great that now its more accessible. When I first started wc, you had to piece everything together. A lot of trial and error and figuring what you need/don't need. I still have huge excess of angled fittings/rads/blocks.I went with the corsair kit to simplify my life other than the water block for the 3080 ti, it came with all of the RGB fans but I actually have all of the lighting off in the case. I prefer no light at all. The Corsair kit while expensive, is great because it comes with everything you need to do that WC build.
Here's my build from a few years ago. In a Caselabs S5 case (MATX)



