How can you start to answer it scientifically? How to explain subjectove experience given the scientific knowledge we currently have?

Also before trying to come up with an answer please be sure you know what the problem is about and especially what it is not about: https://www.iep.utm.edu/hard-con/#:~:text=The%20hard%20problem%20of%20consciousness%20is%20the%20problem%20of%20explaining,directly%20appear%20to%20the%20subject.