I’m also in my late 20s, and I’m an immigrant (changed continents)
When I meet new people, ai usually have a hard time coming up with something to talk about, so I had (still have) a hard time making new friends.
What helped me was to have continuous contact with people in a focused environment, for example: with around 6 months of office attendance I started warming up to my new colleagues (which eventually became friends), even though we were usually talking about work back then, we started to talk about it less and less up to a point where we don’t even work together anymore, but keep in touch
I found another of such environments in sports practices as well: don’t want to talk about anything? Fine, let’s just keep this ball rolling back and forth" but then eventually (again after a few months of continuous contact with the same group of people) things started to warm up a little
So to sum it up I’d say: patience is key, it usually takes a while before prople start to get along well
Not that much, really I moved from Brazil to Portugal and I was surprised by both the culture similarity and the number of brazillians around
Still, when I arrived the closest people I knew were 2000km away hhaahaha, so even small changes can be challenging at times