Developing a WordPress Theme from Scratch
All you need to start is a website. Any website will do. You don’t need to know any PHP, or have any prior experience with WordPress. Your website can be custom, or built on Bootstrap/some other framework.
You do need to know how to set up a local server environment. Fortunately, if you don’t know how, I wrote a short, sweet article about getting set up with one. It will only take a few minutes, so go ahead and do that first.