Basic Help With Interactions

Hi, I quit in 1.19 I have no experience with interactions but they are playing a very key part in my new project as it means I won't have to use advancements to recognise the player clicking something. However, what I've done rlly isn't working lmao could someone walk me through how they work in terms of my code. If you're quick and seeing this i'm in the process of sending through the code in order don't type!