Get a job and buy Bitcoins. Simple as that.
This is the most simple guide and I do not know why there are still many people keep desperate about have no ability to earn Bitcoin. You can easily find a job in the physical world and use your salary to buy Bitcoin. There are likely a thousand places and people for you to convert you Fiat into whatever cryptos you like
Some may decide they like the idea of earning bitcoin directly rather than to try get it by purchasing it, this way you don't have to worry that much about price changes since you did not get paid in fiat but in bitcoin.