How to buy SOL online?

Could you please elaborate on the process of purchasing SOL online? I'm a bit new to the world of cryptocurrency and would like to know the steps involved in acquiring SOL. Specifically, I'm wondering about choosing a reputable exchange, creating an account, funding it with fiat currency, and then finally making the purchase of SOL. Are there any additional factors I should consider, such as security measures or fees associated with the transaction? I'd appreciate your guidance in navigating this process.