The biggest step towards towards success that any dyslexic person, or parent attempting to support a dyslexic student can make is realizing that they don't need to make their focus in life around what sucks. Life is short and reading and writing are important. Alright in a literate society reading and writing are really important. But it is also important to spend time building other life skills, like having a moral compass, playing games, making friends and holding a job. All skills that can be accomplished by anyone whether or not they can read.
Find their success however small and feed them. Find their dreams and light them on fire.