Nasty, don't start with a spider roll. Eww. In Reno the go-to roll for starters is the Mountain Roll. It has crystal shrimp (basically crispy fried tiny shrimp in a slightly sweet sauce), and usually one or two kinds of raw fish inside, whole thing tempura fried with raw fish, usually salmon or tuna, and avocado along the top, then topped off with a fake crab salad w/ mayonnaise sauce kind of stuff on top, sometimes with sriracha. Well, we always request sriracha. This is good because it isn't overwhelming and it tastes ****ing delicious, good mix of textures and flavors. I mean it. ****ing delicious.
A good first nigiri is salmon with a very thin slice of lemon on top. Helps ease into the texture if that is a turn-off. Can also try seared tuna to ease into raw, as it is at least partially cooked. Initially usually best to avoid things like mackarel, yellowtail, snapper, scallops, unagi (all though anago isn't too bad), as they have generally the strongest flavors and/or weird texture. Good old salmon and tuna are great to get started with. Do not, I mean DO NOT. DO NOT start with sea cucumber or sea squirt. That is a very very acquired taste and will turn you off to sushi real fast. Luckily most places don't serve it.