How may I make my infant eat?

When my son was 4 months old, he began weaning, like purees; I found and noticed that he is going to be choosy, picky kid because he never like few. I was right, at 9 months, I started giving him solids. Now, he turned 11 months old and he is so skinny he doesn't eat well, eats few morsels and then he spits it away.

I'm so tensed, that when he is about to learn to eat, he is not even interested in eating. No nuggets, no vegetables,no eggs,no porridge,no potato fries. What I'm suppose to give him.🙄☹️