In Minecraft on my pvp server How do I give players effects when they right click an item in their inventory?

There are plugins that can do that, such as Item Effects - https://www.spigotmc.org/...-11.23055/

It's also possible to do this purely with command blocks, however it would take a while to learn how they work. I've never done anything like this but it would be something along the lines of check for item in player inventory, when item is used via a right click then give the player X effects.