Baby food

My baby is coming up 8 months old, he has porridge for breakfast and puréed fruit with baby finger food crisps for lunch along with his bottles throughout the day and has been for a few months. I have been trying for a long time to introduce a dinner, but he just will not eat a dinner. He likes any fruit and will eat it, but I have tried individual veggies puréed, mixed veggies puréed, blended chicken and veggies, blended tomato pasta, cottage pie, alsorts! He also has no teeth yet.

Is this normal that he still won’t eat a dinner? Or should I be worried?