Going vegan while breastfeeding?

Calling all vegans or anyone with knowledge on the subject! I've been making changes in my health and lifestyle and given than i don't eat much meat anyways (cant remember the last time I had red meat, I eat chicken more than any, and cheese.) So I'd be cutting out cheese and chicken and actually feeding my body properly. I just don't want my milk supply to drop as I'm exclusively breastfeeding my 7month old and plan to continue. Or if doing so would cause detox, I don't want toxins to transfer to milk (although I know breasts aren't typically a toxin dumping ground) so my main question is, does it cause a detox when you rarely consume animal products anyway? And will milk supply drop? As well as any tips on doing so on a budget 😊🙌🏼