Want to overcome my racism

I suspect that more than one issue is in play here. One is a perfectly legitimate fear of walking alone at night in a strange place. The other may be not knowing people, and jumping to conclusions.

So I'd recommend a few things -

Take a self-defense class. Work on eliminating this all-too legitimate portion of your anxiety.

Make friends, of all races. How? Do the things you like to do. Unless you're going to white supremacist meetings, I suspect you'll see a few people of differing pigments at church or acting club or quilting bee or cosplay or whatever. Just go over, say hi, stick your hand out and introduce yourself. Make small talk like mentioning that you're new to the area and haven't found a decent pizza place or hardware store yet. Not everyone will be your friend, but you will see individuality this way. One piece of prejudice is prejudging, that everyone seems alike to you. Meet and get to know individuals, and people won't all seem to be alike.

And I would add that xenophobia is not the same as racism.
Apply Jespah's words and enjoy life.