- Get Intertwined Fate or Acquaintance Fate (often by spending primogems to buy them in the Shop)
- Go to “Wishes”
- Make a wish or ten wishes if you want (doesn’t matter which one you pick because the rates always suck), and
- Hope for the best.
The only advice I can really give you other than that is stop thinking of building for any specific character. Because of the way gacha games work, if you come into the game hoping to get a specific character, you’re setting yourself up to a lifetime of financial debt. You could end up spending literally US $10,000 and still not get Diluc… and you’d have only yourself to blame for dumping all that money to a character you might never have.
The pity system in Genshin Impact only assures you that you’d have a 5-star item. If you got a 5-star character, great! If you got the character in the event banner, even better! But for obtaining specific characters like Jean, Mona, Qiqi, and Diluc? Good frikkin’ luck getting them.