How do I buy SOL on Phantom?

Could you please elaborate on the process of purchasing SOL tokens on the Phantom wallet? I'm quite interested in investing in SOL but am not entirely sure about the steps involved. Could you guide me through the process, including any necessary prerequisites or steps I need to take before initiating the purchase? Also, are there any fees or commissions involved in the transaction? It would be helpful if you could provide a step-by-step overview of the entire process. Thank you in advance for your assistance.