How do I get Aurora on Metamask?

Could you please provide a step-by-step guide on how to acquire Aurora tokens using MetaMask? I'm interested in investing in this cryptocurrency but I'm new to the space and would appreciate some clarity on the process. Firstly, do I need to add Aurora's network to MetaMask? If so, how do I do that? Once the network is added, how do I go about purchasing Aurora tokens? Are there any specific exchanges or protocols I should be using? Additionally, are there any safety measures or best practices I should be aware of to ensure a smooth and secure transaction? Your assistance in this matter would be greatly appreciated.