We have a lot of dim sum in Hawaii and even have a Tim Ho Wan. For us, dim sum is a local kind of thing to take to friends homes for a pot luck, or to watch a football game. I have not tried these recipes, but they look about right. The big thing is getting the proper skins to make the dim sum. Go to your local Asian store and see what they have. Pork hash/siu mai usually uses a pi that is also used for won ton and gau gee. The wrap for half moon, I have not seen in stores. You may have to improvise.
https://www.allrecipes.com/recipe/84858/hawaiian-pork-hash/
https://www.hawaiianelectric.com/recipes/find-a-recipe/gok-jai-(half-moon)
For the pork buns aka char siu bao, you would need to get the char siu sauce/powder to marinate your pork, then roast it, then shred for the filling. You could get an order of Peking duck buns from your local Chinese restaurant, and just fill them with the char siu you made. I know my sister had a recipe to make them as she does Tupperware demos and makes char siu bao. The ingredients should be easy to get. I'll ask her for the recipe.