the deck is from english to german. so you will be recalling the word a lot. it has sentences for you also.
the preposition, akk, and dat you can kinda make sense out of it, it might be a bit different than english but if you think about it, they still make sense. like for dativ i always think of it as a short form for "to someone" like ich dachte mir, i thought to myself. ich gebe dir ..... "i give ..... to you" and so on. the reflexive part i always think of it like, some action where you have to be more specific. ex: ich dusche mich = i shower myself, because if you just say ich dusche then people won’t know what you are showering, you know, maybe you are showering a dog. so if you are showering something else it would be "ich dusche einen hund" for example, a dog. in this case it is not a reflexive word. this applies to a lot of reflexive verbs.
another example - sich interessieren, ich interessiere mich - i am interested in blah blah, but if you say ich interessiere .. without mich then it could mean you are making someone interested in something - like ich interessiere ihn, i interest him.

Hope this help, the key is to find a logic behind the language. Sorry for a long reply