No. It will be physically impossible to canvass the whole Island on foot (or even by bike or car) in the time you have available.
If you try to do that, you will have no time left for other methods of campaigning, which are likely to have a more substantial impact, and that will put you at a real disadvantage – as well as leaving you exhausted!
But I think it is worth doing some door-to-door work if you can fit in the time, and if you are able to do so. I’ve written about how you might want to approach that, here.