I understand now...
What about the faucet websites?
Do they buy them bitcoins or they earn them?
That was the idea of starting my bitcoin adventure

Faucets are a waste of time and energy. You can go collect a thousand times at faucets and maybe end up with a couple of pennies.
If you're patient enough, you should "level up" here in Bitcointalk forum, then join a signature campaign if you want to get paid in Bitcoin for free(get paid for posting). Much more efficient way to get decent amounts of BTC without mining expenses.