How to buy SOL on Phantom?

How exactly can someone purchase SOL on Phantom? I'm trying to diversify my crypto portfolio and SOL seems like a promising option. Could you guide me through the process step by step? Is there a minimum amount required for purchase? Are there any associated fees or charges that I should be aware of? Additionally, are there any security measures I should take while making the purchase to ensure the safety of my funds? I'm quite new to this, so any detailed information would be greatly appreciated. Thank you for your assistance.