Since you are just starting, I would recommend exploring this forum and learn first. Then while you are participating and posting on this forum, you will eventually gain an activity (on your account) and of course knowledge. If you've reached a quite higher rank, let's say a member rank, then you are now ready to join on a signature campaign and you can start earning quite good amount of bitcoins. Additionally you can participate on giveaways here on the games & rounds section or if you are persevering , you can claim little satoshis on faucets.

There are actually more ways, I'll just let you explore those in this forum. Have fun