How do I buy Stellar XLM?

Could you kindly enlighten me on the process of purchasing Stellar XLM? I'm quite interested in investing in cryptocurrencies but am not entirely familiar with the steps involved. Could you please outline the basic procedures I should follow? Do I need to set up a specific wallet or exchange account? Are there any security measures I should take? Also, could you recommend a reliable platform or exchange for purchasing Stellar XLM? I would greatly appreciate your guidance on this matter. Thank you in advance for your assistance.