How to meet new people in Vietnam

Hello, I have been travelling in Vietnam for 3 days. I really like it here. My first destination is Hanoi, which is absolutely very lively and chaotic, but also very charming. Even though I really like being in Hanoi and exploring the city, especially the Old Quarter, I’m feeling kind of depressed. It‘s my first time travelling to another country. I‘m 19 and I’m from Germany and Vietnam is basically is on the other side of the world. It feels like the complete opposite of Germany.
Its really hard to make friends around my age here because I dont speak Vietnamese and a lot of people here barely speak English. I spent most of my time alone doing photography. I was yesterday at a night club in the Old Quarter. But I couldnt really talk to someone. Because I was super nervous to talk to someone. Especially to girls. I‘m introverted and Im considerate of others to not make them feel uncomfortable. Its really hard to not feel depressed and lonely. Could someone give me some tips? I will be staying in Vietnam for 2 weeks, todays my last day in Hanoi, I will be going to Ninh Binh tomorrow. Afterwards Ha Giang Loop, Ho Chi Minh City. I wanna enjoy my time in Vietnam, meet new people and not regret anything.

Thank you very much in advance!