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 saw so much video back before the trade update came out, where they tried to trade up from zero to a very expensive skin. Is it still possible, or should i just bug like a 50€ skin/keys and start with that?