Could you give me advice how can I get free bitcoins or how can I earn my first bitcoin?
Probably you don't have any skill to work on the internet and is just looking for some easy money. You can check services section and join a Twitter capmpaign/task. You need to do complete a mini job, like retweet something or write a tweet to receive some satoshis.
You can visit Micro Earnings section too and try some faucets, a little income of satoshis for free. Continue here on forum and when your rank up a bit more, you can join a Signature Campaign and start earning satoshis by posting on forum.