Do a Google on "cannabis and liver" and read what you find. It mostly talks about smoked cannabis, and it seems there is conflicting information out there. Some of the articles said that it could aggravate the damage caused by hepatitis C, but I found others that said it was beneficial, like this one., but that's not a surprise considering the pro-cannabis source of this info. They mostly all seemed to be referring to smoked cannabis.
AAMC: Hepatitis C - The Silent Killer

One option you have is to have bloodwork that checks your liver function before you begin eating cannabis, then have it done again afterwards and see what effects it has on you personally. You're wise not to drink alcohol.