How much dot do I need to stake?

I'm new to staking and have been exploring the Polkadot ecosystem. Could you help me understand how much DOT I need to stake? I've heard about the concept of locking up my tokens to support the network and earn rewards, but I'm not sure about the specific amount required. Could you guide me through this process and explain any potential risks involved? Also, would staking DOT require any technical knowledge or skills? I'm eager to learn more and start staking as soon as possible.