What do you think is the best/most efficient way or resource to study endgames?

I'm following a course on the essence (most important concepts) of Dvoretsky's endgame manual which covers thoroughly a large number of key positions in different types of endings (only pawns, rook and pawns etc...), but it is really A LOT of stuff. And I'm really worried I'd never remember all those key positions in a real game... Maybe I could focus more on general ideas instead of trying to learn tons of key positions? Could you recommend me a resource using this approach? (if it exists, obviously)

What is the simplest and "least memorization demanding" way or resource to study endgames?

I'm following a course on the essence (most important concepts) of Dvoretsky's endgame manual which covers thoroughly a large number of key positions in different types of endings (only pawns, rook and pawns etc...), but it is really A LOT of stuff. And I'm really worried I'd never remember all those key positions in a real game... Is there a resource or maybe simply a different way of studying endgames which focuses more on general ideas instead of trying to learn tons of key positions?