If you are able to obtain yarn made of fibers such as cotton and silk, you can knit many garments to wear in warm weather. A cotton or silk sleeveless shell is the simplest. It can be shaped, or (depending on your figure), you might even be able to wear a super simple top which you make by knitting a tube plus two rectangles attached as straps. You can also knit halter tops, tube tops, lingerie and even swim suits.
There are some videos available which show an instructor knitting a specific garment from beginning to end. I don't know of any that show an item suitable for your climate, but I will be on the lookout for one. You are right...there is nothing more helpful than SEEING how to do it!