The Start Up visa is a path for people who have a business idea and want to start a business in Canada. However the application process isn't that easy. First of all the business has to be innovative (i.e. something new). So if you're just going to start a catering business, that's not a new idea and you won't fit the category. You have to find a designated organization (incubator) in Canada that will support your business idea. This can be quite challenging to do as well.
Based on the information you've provided, I would recommend you look into the Express Entry program instead. This involves creating a profile and hoping you have enough points to be selected (you want to have more than 400 points to have a decent change of being selected). To qualify in this categories you do need to have skilled work experience (which you should if you're a cook). You'll need to get your education officially assessed before you can create a profile - and also take an English language test (IELTS General) and achieve a high score (more points for higher scores). You'll also need to make sure you have enough funds to apply (you need to have money available to support yourself as you get established in Canada).
