How do I add a Shibarium network to MetaMask?

How do I successfully add the Shibarium network to my MetaMask wallet? Could you please provide a step-by-step guide? I'm a bit new to this and want to ensure I do it correctly. Are there any specific settings or configurations I need to be aware of? Also, will adding the Shibarium network affect my existing cryptocurrencies in MetaMask? Is there any risk involved? Would you recommend any additional security measures when performing this task?