If you want coins for yourself, then you have to buy it, and if you cannot afford to buy it, then you can offer a service and receive payments in bitcoin or in any other cryptocurrency, but to do so you have to be skilled in something, and it is that skill that you are going to offer to users in the community.

That being said, it is also possible to earn coins through airdrops and faucets, but it is not so profitable and you might just be wasting your time for little or nothing.