You should make sure that the jars that you are using to place the jam in is sterilized correctly to avoid any illnesses as well as making sure the seals are tight on the jars.
First have many people try the jam, and get their opinions, make changes based on their comments. Take into account the cost that it will take to make the jam, and then determine if people would buy it for the price you desire.
Make sure your kitchen is immaculate. Check with the Better Business Bureau to find out what the regulations are regarding home based food businesses. You may need a kitchen inspection.
