My son is just really naughty, constantly getting into weird situations, always climbing somewhere.…

My son is just really naughty, constantly getting into weird situations, always climbing somewhere. He swears and even makes inappropriate gestures, mostly in front of his sister. At the same time, he's a quick learner, loves books, and adapts well to new things, but his behavior is lacking. He admits himself that when he understands everything, he gets bored, so he entertains himself this way. But I don't know how to act so I don't lose my temper, and he grows up to be well-adjusted? I'm constantly on edge with him. When he does something completely wild, I scold him, but he's fearless; no scare tactics work, and neither does persuasion. Taking away his tablet helps, but only for a short while...