Well, they say there are 3 basic and equally important foundations on which fitness is based: training, diet and rest. To get results, you need to pay attention to all of them, not just one or two of them. Seems that you only struggle with nutrition so hopefully, you will handle that too somehow. I know you are a vegetarian and building muscles takes a lot of protein but there are ways to get that protein from vegetables too. Legumes are full of protein for example. And all kind of nuts as well :) Where there is a will, there's a way 💪🏻