Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
I have been playing for almost 5 days, so to speak, intensively, and I am currently building around level 9 and I still have a long way to go for the first reward, which does not even cost time.