How do I tell my family that they're going to lose me?

So I haven’t been feeling well lately and decided to go to the hospital which is something I didn’t want because In light of the corona virus pandemic I didn’t want to ask my dad to travel out of state because he works. I had to go out of state because all the local hospitals don’t listen to me. It turns out that I am very sick. I have been diagnosed with Advanced Stage Liver Failure and told that at this point a transplant will take too long meaning ill be gone most likely before a donor can be found. This is very harsh and devastating. While its not 100% certain I’m going to die, I have a better chance at hitting the lottery on Wednesdays drawing then I do at finding a donor in time. I want my family to hear it from me but I don’t know how to tell my parents that their going to need to start planning my funeral.