How to become capable of starting a startup?

Hi I follow HN everyday and I read almost all the articles. It inspires me a lot to do something novel to do something unique which will change the game. I am technically capable of doing it if I think but mostly I dont think that way. Whenever I find some idea I see someone has already implemented it so I quit and loose enthusiam.

Now is the time to go for a startup. Whenever I see startups getting launched and being successful and used n number of users everyday I feel motivated but I dont know where to start? I am trying to get into some startup experience but not getting it too.

Please guide.