What am I looking at?

Can anyone help me I.D. these little, white fellas? The one I'm focused in on is between 0.5 and 1cm. The tiny specks, though hard to see, look like they might be the same white worm thing, but only about 1mm in length.

My prevailing thought is that they're detritus worms, but this is my first time seeing them and only my second tank. The tank is about a month old, I'm still cycling (0 ammonia, ~1 nitrite, ~10 nitrate). I haven't added any livestock yet (though I do have what I believe to be one lone bladder snail) and it's planted with non-in vitro plants.