How do I start a white label?

Could you please elaborate on the steps required to initiate a white label cryptocurrency exchange? As a novice in this realm, I'm eager to comprehend the initial considerations, such as identifying a reliable software provider, assessing customization options, ensuring regulatory compliance, managing security protocols, and establishing a robust support system for clients. Additionally, I'm curious about the estimated costs associated with launching a white label, as well as the potential challenges and opportunities that lie ahead. Ultimately, I seek a comprehensive roadmap to embark on this journey with clarity and confidence.