Ofcourse you need some basic cognitive functions in order to be able to read, write and present yourself. Remember you don't have to be best to get a degree, you only need to pass and when you don't succeed you can in most cases try again.
That said, get a degree if you can. It will help you in the job market, and if you for some reasons don't pursuit a degree for any random reasons - you will still have the background leading up to this point in time which can count as experience.
