Hi, is it ok to start porridge for baby at 7 months plus?

Yes definitely ok. In fact I started my gal with porridge at 7mo. Try to make the porridge very watery for a start. One portion of rice to ten portions of water and then slowly decrease the water proportion. You can add in other ingredients to make the porridge nice too. I started giving my gal fish at the same time. Babies use gums to mash food so don't worry about it