Two problems are runnig against myself

My name is Christian Hückinghaus and I live in North Rhine-Westphalia, Germany. I am self-employed and a passionate gardener.
I hope my English is good enough to understand my intentions. There was a lot of trouble in our family over the use of the word “Indianer.” We Germans are very complicated, or can be because of our past. What is right and what is wrong? I use the word in a warm context. My inner attitude isn’t from above; it’s at eye level. Here in Germany, there are also people who place the nation above their heads. But I have to justify myself by saying that I’m not a nationalist when I use the word “Indian.” And I know that better than anyone else. Because I have a Hungarian and an Italian girlfriend! A twisted world.
In my free time, when I’m not in the garden tending plants, I write about a young Shoshone man trying to find his way. In the story, a secret US Air Force experiment takes place. This creates a space-time shift. The protagonist encounters an allied group of warriors from various Native American tribes. I don’t want to reveal any more – Smile.
I don’t talk about it publicly because I’d be accused of cultural appropriation.

Perhaps you can help me a little with some of these points. I would be very grateful.

At some point in my life, I’d like to meet people who hold the earth in their hearts, no matter what nation or tribe they come from. Actually, as many as possible.

Vielen lieben Dank ich pflanze einen Baum für Euer Glück.

Christian Hückinghaus