Good news: vitiligo will not prevent you from getting a tattoo.
Vitiligo is a condition of the epidermis characterized by depigmentation that appears and spreads on any part of the skin. This is not a fatal condition, and there is no contraindication to getting tattooed.
To carry out your project and adapt it to the natural features of your skin, you just need tosend a photo of the area you want to get tattooed (with a scale reference such as a ruler placed on your skin, for example). That way, I can tell you what can be worked with or fully cover your beautiful marks..
Photos of the area to be tattooed are also useful for creating a mock-up, a projection of your design, so you can see what it might look like.
If in doubt, for reassurance: always consult a healthcare professional (general practitioner, dermatologist, etc.) who can advise you on what is best for you and your skin.