I don't think I would ever try making any myself. I once read a recommendation to only eat sashimi only made from fast swimming ocean fish or risk becoming host to a parasite.
While I do now eat sushi and sometimes sashimi. I lived in Hawaii for 4 years in the 70s and never once ate sashimi while I lived there. Partly this was because at the time I was a young 23 year old guy from a small town in the hills. Pieces of raw fish were bait, food for fish, not food for people.
But the other reason I avoided such things till years later was when I first moved to Hawaii, probably within the first 4 weeks I lived there. A news story reported about a bunch of people with parasitic worms living in their throats. They were mostly tourists who had eaten improperly prepared sashimi at a restaurant that mostly catered to tourists. It was a floating restaurant on the water front in Honolulu.
While you can do this I probably wouldn't advise it. Most sushi restaurants serve salt water fish, not fresh water and most of those were flash frozen before finding its way to the restaurant. Not fresh right out of the water. If you must try it, educate yourself about how to do it safely.