How to purchase Ordinals?

I'm interested in exploring the world of Ordinals, but I'm not quite sure how to navigate the process of purchasing them. Could you provide a step-by-step guide on how to acquire these digital assets? I'm particularly interested in understanding the prerequisites, such as setting up a cryptocurrency wallet, choosing an exchange or platform, and ensuring the safety of my transactions. Additionally, I'd appreciate any insights into market research or tips for identifying trustworthy vendors in the space. Ultimately, I'm looking for a comprehensive overview that will help me make informed decisions and safely navigate the process of purchasing Ordinals.