Ask HN:How do you manage to go through loads of infos to build a product?

Everytime I want to learn some topic, I learn many things about it but never seems to be sufficient to build a product. I am of course talking about the programming and technology stuffs. suppose when I want to learn about javascript I get started soon but then I am lost within tons of information about it, the books, documentation, videos and never reach to build some product I am proud of. Any good suggestion would be appreciable.