Aww brilliant thank you :)
We found not paying any attention helped and not giving her a full plate. We’d place one thing on her tray and essentially ignore her. Have a conversation, make a cup of tea, sing along to the radio. Eventually she’d try it and we’d place another bit of food on her tray. We’d always end with her favourite food, banana and then do a dance once she was out of the high chair to keep mealtimes fun
It’s tricky as if it’s all new then it’s going to take time with lots of exposure! Great that it’s going in his mouth, even if spitting out! Def worth praising. Modelling where possible will help too!