You already made your first step in earning bitcoin from scratch. Just rank up your profile here and join signature campaigns. I started here without investing a single satoshi and now I earn a hundree thousand of satoshi everyday. Just hard work is needed here.
But its so long to wait every 360 seconds. I have very short attention span.. I get so bored easily.
To increase your rank and activity you need a minimum of only one post daily. After your rank gets increased, you can post at less intervals !
As you are new to this forum, I would recommend you to just be a reader at first and learn new things.