The "City of Freedom" quest in Genshin Impact is part of the Archon Questline, specifically in the Prologue: Act I - The Outlander Who Caught the Wind. Here's a walkthrough for this segment:
Image via HoYoverse.
Unlocking the Quest 
1.Prerequisites: You need to have completed "Going Upon the Breeze" to unlock "City of Freedom."
Quest Walkthrough
2.Enter Mondstadt: Follow the quest marker to enter Mondstadt for the first time. There will be some dialogue as you approach, setting the scene for the city known for its freedom and wind.
3.Meet Amber: Upon entering Mondstadt, Amber will greet you near the city gate. She'll give you an introduction to the city.
4.Follow Amber: Amber will guide you through the city. This part is quite linear; just follow her while she explains various points of interest like the Adventurers' Guild, the blacksmith, and other key locations.
5.Visit the Cathedral: Your tour with Amber will lead you to the Mondstadt Cathedral. Here, you'll meet Barbara, the deaconess, briefly.
6.Go to the Knights of Favonius Headquarters: After the cathedral, Amber will take you to the Knights of Favonius Headquarters. Inside, you'll meet Jean, the Acting Grand Master, and have some interactions with other characters like Kaeya and Lisa.
7.Report to Jean: Jean will discuss the current situation with Stormterror and ask for your help. This conversation sets up further quests.
8.Free Time Exploration: After your meeting with Jean, Amber will suggest you explore Mondstadt at your leisure. This isn't formally part of the quest but is encouraged for world-building and to familiarize yourself with the city.
Quest Tips 
•Exploration: Use this opportunity to explore Mondstadt. Open chests, talk to NPCs, and get acquainted with the layout. This exploration can yield useful items and side quests.
•Character Interaction: Engage with all the characters you meet. These interactions can sometimes lead to hidden quests or additional lore.
•Prepare for Combat: While this quest itself doesn't involve combat, subsequent quests will. Make sure your characters are adequately leveled and equipped.
Quest Rewards
•Adventure EXP: Completing this part of the quest provides Adventure Experience to help increase your Adventure Rank.
•Items: There might be minor rewards like Mora or some basic items, but the main reward is progression in the storyline.
•Primogems: You might receive a small amount of Primogems, which are precious for Wishes in the gacha system.
Remember, "City of Freedom" is more about introducing you to the world of Genshin Impact, its mechanics, and its characters rather than challenging gameplay. Enjoy the narrative and the beauty of Mondstadt as you prepare for the adventures that lie ahead. If there have been updates or changes to this quest, checking the latest game guides or in-game quest logs would be beneficial.
