Reporting
Your idea of adding nutrients

Your idea of adding nutrients is a good one, but not in the way you decribe. Those ingredients are best when they are composted—rotted away in a pile of leaves and other things outside over a period of months.

Without having an idea of the quality of your soil, adding fertilizer could do more harm than good. Don't pack the soil around the seed. Keep it a bit loose so it has some air. Make sure there are holes in the bottom of your cup so excess water can drain out (and not drown the seed). Keep it in a warm place and give it sunlight when it sprouts.