How to expert in sports?
The best thing to do is to start young. That may be difficult for you, but it's never too late to start. The biggest mistake you can make is to not start at all. You have to live with the regrets of your past forever. You can't change the past, but you can change the future. So be relentless, ignore the naysayers, and go for it.
Some of the famous sports associations:
World Blind Cricket Council (WBCC)