Try apples, corn, peas, lettuce, oranges. Sunflower seeds should be avoided since these are addictive to birds and very high in fat. Try to buy seed mixes without sunflower seeds. Sunflower seeds can be given in small quantities as a treat. Clean fresh water is a must for a healthy bird.
Most birds try to bathe in their water bowls.
Therefore, be sure that you clean it often. Never feed your bird chocolate or caffeine as these are poisonous to birds. Be sure to buy the largest cage you can afford and suitable for your bird type. Your bird will spend most of its time there and will need to stretch its wings and climb from perch to perch. Your bird's cage should be placed in a sunny room away from drafts.