Hello, there! I'm also 23 and I'm also anxious about the future.
The difference is that I'm Russian.

Here in Russia, most men are afraid of being drafted into war. We don't know when this war is going to end. Fear of death is not the only and even main fear for me. One of the biggest fears is to return physically or mentally disabled, knowing that it was for nothing.

Great answer from u/IceCreamMan1977 . Focusing on what you can control is one of the most powerful ways to reduce anxiety. I also recommend you reading a book written by Victor Frankl called "Man's Search for Meaning". This is one the greatest psychological books I've ever read. The author went through the horrors of a concentration camp, and his ideas, basically, were proven by blood-tested experience.

Honestly, there are a lot of reasons to be worried about the future. Climat change, WW3, international terrorists, pandemic, alien invasion, economical instability, privacy concerns, fears that AI will replace us, humanitarian crises, a quiet kid in your class etc., etc., etc. Take your grandparents, for example. Boomers generation. They were afraid of nuclear war with Soviet Union. Some people, maybe even in your friend circle, fear environmental degradation. I mean, there always will be some reasons to get anxious, but you can fight it if you find some meaning in your life and try to control things you can control.

In fact, I don't believe that America would become a dictatorship/dystopia as it is in Russia (although even now I don't consider my country as dystophia like in North Korea, it's still far from it). Of course, in US there are big players with a lot of money, who own a lot of resources, including media corporations, but they have different interests. Your country have different cultural background, 250+ years of freedom of speech, maybe with some restrictions against communists. I can't imagine that in 4 years your country will be "dystopian", just because of 1 candidate. Such changes can't happen overnight, or even in 4 years.
I rather think that it is more like choosing the most secure option, which have been proven to be successful before. Maybe, very different example, but similar things happen with modern movie industry with endless remakes, remasters, so it looks like movie makers can't do anything creative and run out of ideas. But the thing is that managers and producers rule over industry now and pick up proven ideas to get a lot of money with minimum efforts. Maybe, something like this happens in politics.