How bad is Trump becoming president again?

I live in a European country, and whenever I mention that I want to move to the U.S., people immediately say things like, "Well, Trump won… are you sure about that?" When I ask why, they tell me he’s going to turn the country into a dictatorship.

Now, I get that Trump is a controversial figure. I know he has strong anti-immigration policies, is against certain refugee programs, and has been accused of undermining democratic institutions. But at the same time, the U.S. isn’t just any country where a dictatorship could easily happen. There are checks and balances, and it’s not like one person can just seize full control, right?

So, I’m curious—are Americans actually as worried as people here seem to be? Do you really think Trump could seriously threaten democracy, or is this just exaggerated fear?

And as someone who wants to move to the U.S. in the near future, how much should I actually be concerned? Will things change significantly for immigrants under his presidency?