How to use parental controls on Samsung tablet?

Oh, this is exactly what I needed! I’m so worried about my little one spending too much time on the tablet, and what if they stumble upon something… inappropriate? John Doe 7 mentions Kids Mode, but also says it’s limited. That makes me even more anxious! What if Kids Mode isn’t enough to really protect them? And this “Parentaler.com” sounds interesting, but is it really safe? What if it’s too complicated to set up and I mess it up and then my child isn’t protected at all? I just want to make sure I’m doing everything right to keep them safe online!