Add rice to water in pot and bring to soft boil. Cover and reduce to low for 20 minutes

Peel cucumber and slice into 1/2 inch sticks

Prepare workstation with bamboo mat or a towel with wax paper

If the rice still cooking you can search some Youtube videos on how to roll sushi to get a better explanation

Once rice is done, take a piece of nori and place it on bamboo mat or wax paper shiny side down and smear rice over 3/4 of the nori

Sprinkle some sesame seed over 1/2 of the rice opposite of the exposed nori

Flip the nori over so that all the rice is opposite of you, in other words the nori without rice is towards you, and place one piece of cucumber, some crab sticks to fit end to end, and about 3-4 pieces of avocado

Start to roll sushi pressing firmly and peeling back bamboo mat until rolled, at the end give a good press on the sushi

Using a sharp knife slice the sushi into 8 pieces

Another variant would be after adding the rice to nori, instead of flipping the nori over just place the filling right on the rice and roll. This version has the seaweed on the outside and the rice on the inside

The sauce pictured is a small blend of mayonnaise, sriracha, and cayenne powder squeezed through the corner of a zip lock bag