Plastic Containers: (any variety) carry-out, egg cartons, etc.
A Bag of Potting Mix, but any dirt will do
Packets of Seeds
A Thumbtack
H2O
Every few days, check moisture content & assess if additional water should be added. The soil should not be desert-dry or swamp-soaked, but somewhere in between, unless directions on the seed packets suggest otherwise. The plastic containers act as a mini-greenhouse, and condensation will collect in the seedlings environment, helping to retain water.
The next step is to figure out the optimal location for each plant to thrive [citing soil conditions/sun exposure] & transplant. Have no fear- there's always Eastern Market if nothing grows. If it doesn't go well, I will be scouting for radishes instead of slinging butternut squash.