Want to Build a Vegan Website

Hello All,  I am vegan from the last 7 months and i want to build a WordPress website but i am confused for a free or paid theme. Can anyone tell me free theme is working fine? I want to build a website that gives vegan information to the right users. I have check one reference for this and I want to build a site the same as this. Can anyone tell me some wodpress themes or plugins?