Good plan

I believe that at least common softies like Pachyclavularia, or green star polyps, can grow in 30-50 par settings, so perhaps 38 par isn't so bad as I thought

I keep an anemone and I use ocean revive in order to give around 300 par easily so I was thinking 38 was way too little ..but, as I said, I don't even keep corals.
I use a Kessil a80 on a livefood nano, as far as I can read online, the Kessil gives around 40-70 in the middle and 30-50 along the edges of the tank. I have a snip of zoanthus sociatus in that tank, but I cannot tell you if they are growing because I am testing how low temperatures they can take, so they are neither growing nor doing awesome atm.
The higher spectrum whites can look less inviting than the lower and warmer whites so usually people prefer a mix of whites to soften up the look. If you get corals from deep water, generally they are used to bluish light. The stuff from shorelines, like long tentacle anemones, are used to more direct sunlight and might require more whites.
Good luck, oh and one more advice; remember that wild caught fishes may die if you look at them funny so their chances are better in gigantic sized tanks... To spare yourself the pain, go for tank-raised fishes, they are way more easy to domesticate and a joy to keep
