At first I thought these were scanned prints ... and with that I would have thought the grain/noise (as I now know) was ok and attributed to the prints having been digitalised on a flatbed scanner.
But now I hear they are digital photos all right.
The idea is good, and I am sure you can reshoot these at any time, this being your alarm clock and your coffee mug, and maybe you should, with a lower iso, at bit more lighting (bring all the desk lamps you have), and a firm support (mini tripod?) on which to rest your camera.
And then just try again

.