How do I transfer crypto from USD to Binance?

Excuse me, I'm a bit new to the world of cryptocurrency and I'm looking to transfer some crypto funds from my USD holdings to Binance. Could you please guide me through the process step by step? I'm particularly interested in understanding how to convert my USD to the required cryptocurrency first, and then how to securely deposit those funds into my Binance account. Additionally, I'd appreciate any tips on avoiding common errors or risks associated with such transactions. Thank you for your assistance!