I assumed that might this OP ask on how he can earn Bitcoin or how to work just to earn Bitcoin.
This thing that's come up in my mind, Bitcoin mining is also good but I think it is profitable as of now. If you know the basic technical stuff of Bitcoin, you're good at this mining.

Or probably let's assumed that this OP ask how Bitcoin and Blockchain technology works. Well, it's a long discussion and I think this forum is the right place to study and research that matter. Just apply on Google searching, for sure there are various blogs that give knowledge about Bitcoin and the Blockchain tech.

Anyway, welcome to the biggest Bitcoin community.