Is Canva enough, or do I need a professional shoot?

Canva is enough for type, price and date on a photo that already belongs to the venue. It is not enough when the source file is a dark phone plate and the template is there to hide it. Sort what you already have: menu photos, the logo as a vector, and the lines that change each week. When a shoot is needed, you leave with the session in the room plus pieces already set with that photo, not a pack of empty backgrounds.