Get your hands dirty - that is the fastest way! Follow along with the many videos and wiki guides https://wiki.mdriven.net/index.php/Starter_Kit
You can start MDriven-Designer from https://MDriven.net and use it up to 50 classes without license. It is a very potent UML tool that also can execute the model you create.
Even if there are new words/concepts to learn they all have a specific meaning and you will understand their relevance once you have the need for them.
Contrary to traditional coding you can get feedback in just seconds - from idea that goes into model to web-app running in Turnkey prototyper in seconds.
Don't understand ViewModels or Actions? Do AutoForms! Then look on how they where created and change them to your liking - this will help a lot I think.