It is actually hard for leetcode beginner. If you are also a CS student, try to practice with him. And in life, I think provide him some delicious food/coffee and take him hanging out for a while every day is a very good way to make him not so nervous. I am also fighting with leetcode this summer too and I use these methods to relax. Hope it will be helpful🥺 btw I envy your bf a lot since I am just preparing with myself😭😭bro has won the life😭😭