Baby Food tricks....

Help! My LO is 6months and we are starting baby food. We are starting with oatmeal mixed with breastmilk, squash, and green beans. He hates all of them. He will kind of eat some eventually, but constantly pushes it out with his tongue. Is this normal and I just have to wait it out until he figures it out? I have tried giving him food before his bottle, and sometimes after. It doesnt really make a difference.

We have mostly been using the Beechnut brand. Do you notice a difference of them liking homemade food, over store bought?