How do I buy data crypto?

Excuse me, could you please elaborate on the process of purchasing data crypto? I'm a bit new to this and would appreciate a step-by-step guide. What platforms or exchanges can I use to buy data crypto? Are there any specific requirements or verification processes I need to go through? Additionally, what are some things I should consider when making my purchase, such as market trends, fees, and security measures? Thank you for your help.