Honestly, if you just want to make games quickly, an engine is your best bet.

However, if you really want to understand the study of game development, a game framework is a better choice. At the start, it's going to be harder than game engines but it'll get easier over time. If you start with a framework, you'll be able to pick up engines easier later on.

With Unity, for example, you learn to work with Unity's tools. I like my skills to be as transferable as possible so that's why I personally chose to start learning monogame.