Store them in a cool, dry place out of the sun. Seeds can be soaked in water for two days prior to planting to speed up the germination. Plant two to three seeds in a two-inch pot filled with good sterile potting soil. Make sure the soil is sterile or you may get dampening off, which rots the seedlings. You need a stake for each plant to twine around.
Chopsticks work fine.
When the plant outgrows them, you can gently replace the sticks with longer stakes. Keep the plants watered and feed with a dilute solution of fertilizer. By placing the pot in a saucer you can water from the bottom and lessen the chance of injuring the vine or making a mess. Grow the seedlings in full light with shade from the strongest sun. By starting the seeds in March, you will have flowers almost two months earlier than planting directly outdoors.