Create a Unique Timed-Writing Typing Application

I am a job-seeker. I have some physical disabilities, including limited vision, but the vision problems aren't to the extent that any of the eyesight problems get to be labled as a 'disability', but the problems are there, and any time I blame the vision problems as my problem in passing the State's typing test, I often get labeled as 'being in denial'. It is the problem I have with passing the State's Civil Service Typing Test, and I would like to 'simulate' that typing test so that I can 'practice' in a simulated situation here at home. If I can 'practice' at using my eyesight in this manner, I might be able to learn how to pass that typing test. I would appreciate it so much if could hire a 'programmer' to create such an application for to purchase. And, maybe if that application becomes 'outdated', I can then hire you or another programmer to update the program as my Windows operating sytem and system hardware become outdated.