Semi truck t shirt designs for new brand

Early stages of starting a new brand of semi truck apparel, I have a big passion for trucks. My brand will be called highway heroes and my goal is to give a percentage of sales of my shirts to what I call highway heroes also apart from trucks being police , fire , ambulance. If I can help and do something in a positive manner I’m all for it. I will leave pictures of ideas and style designs I’m really looking for.