It is usually said that at six months of age, breastfeeding or formula is no longer sufficient as the sole source of nutrition. It is then time to start supplementing the milk with real food and letting the baby try new flavors. Many people find that the baby is happy to try but rarely takes in any significant amount of food at first, and you may have to try many different variations of food and forms of feeding before you get it right. It is usually not until the age of one year that you can have real food as the sole diet, but many combine it with breastfeeding or formula long after the age of one.
Some foods need to be introduced to babies in small amounts so that the body can get used to them. This applies to gluten and cow's milk products, for example. Common foods that are usually given to babies are fruit, vegetables and root vegetables - preferably cooked or otherwise in a consistency and form that a little one, often without teeth, can swallow. The recommendation is to avoid salty foods and products with added sugar.
Talk to your nurse at BVC or read, for example, on 1177.se for advice on food for babies from six months of age.