I know some vegans who are healthy and seem to do quite well on the diet. There are also people who are healthy on a 100% meat diet and actually can't eat a lot of vegetables. Every body is different. You need to try different things and find the diet right for you. And know that as your body changes with age your diet will probably need to change as well. Whatever you do, don't eat a lot of fake meat. That shit is processed garbage.

https://understandingag.com/artificial-animals-part-2-the-hidden-dangers-of-processed-plant-proteins/