Starting solids confusion 😣😣😣😣

My baby is very interested in solids. He is trying to grab food out of my hand and put it in his mouth! He doesn't meet all the signs of readiness yet.. Specifically sitting unassissted but can with support, no pincer grasp, we also don't know if he has lost his tongue thrust without trying solids? Or if he will chew? I don't want to start him early because he had feeding issues early in life and we dont want to experience more digestive upset by not following what we need to! But WHAT DO I DO!?!?! He is 6 months exactly today. (Edit: Forgot to mention my doctor is very old school and tried to get me to start solids at 3 months.)