Girls, hello everyone! I don't know how to be... My son is trying to s…

Girls, hello everyone! I don't know how to be... My son is trying to sit ?He grabs everything and you can't even turn around, he's already sitting. Shaking, holding onto something, but still sitting. He doesn't want to lie down at all. We haven't even got supports on our hands yet, and he's already throwing such stunts. Who dealt with this in a similar situation? When did they get support on their arms? I think it's too early and not right.