I also did it but it was because my keyboard was worn out so all the labels were erased lol.

You could also type in the dark with a non-illuminated keyboar, but I prefer to commit to the challenge and not look by willpower alone.

I could go with blank keycaps. In fact, some of them look more stylish.

For the f and j keys, i reccomend an rgb keyboard that displays all colors so you can bind it to the f and j keys. Clear keycaps on f and j