📄️ Ability Sets
First of all you should add Queueable Ability System Component to your character. This can be achieved both c++ or blueprints. Or even further, you could make a child of Queueable Ability System Component and use it instead. After this your Details panel should look like this:
📄️ Effect Sets
Effect sets are just a bonus of this plugin. They don't interfere with any other system of this architecture. So if you want to skip go ahead. But they provide a structured way to implement passive effects that our actors need, or initialize some variables (Such as movement speed, health/stamina regeneration etc.). Generally you want this effect's Duration Policy to have Infinite as value.