Pronoun Case (Kasus) training in German for native speaker

Language Corner
1
I grew up as a native German speaker, speaking German at home, but only learning Danish and English in school. I taught myself to spell German while I was younger, and since I have mostly just read and spoken German, I never had the biggest difficulties getting along. Danish and English similar in the sense that that there are no case (kasus) and the pronouns are pretty simple.

However, now that I live in a German speaking country, I find myself struggling writing German, since I mess up the pronouns based on the case. Whenever i try to find literature or training in German, the level is way too low for me.

Do you have any advice or tips on literature or specific training on how I can learn to use pronouns case better?

2
Since you already speak the language you just need time to study in my opinion, that's how german learners do it as well.

You can find on the internet the grammar and you can exercise on your own by writing e.g. sentences that you found yourself saying without kasus correctly and repeating. If you need support from a teacher you can find someone on Italki agreeing on this specific learning objective. When you read you should always notice the kasus and make an effort to understand why it's there and repeat in your head the phrase as a whole if it's something commonly used so that it will come natural to say it with the right case.

Same thing when you speak, try to make an effort to say it the correct way once you are familiarized.

3
There are certain verbs that demand a specific Kasus. You can find lists online. Once you know which verbs are followed by what, it will get easier.

4
This is basically just a set of rules that you have to learn, and practice applying until you can do it without thinking. You don’t need C2 level texts to learn this. Note that the adjective endings also change with the case as well as the pronouns and that there are two types of adjective endings (strong/weak) which you need to learn as well.

So you need to learn (if you don’t know all these already):

- all the different definite and indefinite pronouns and the combinations for each gender/plural and case.

- the (weak/strong) adjective endings for the above.

- when to use the different cases (e.g. some prepositions always take the same case and some change depending on how they are being used).

Then there are lots of free online exercises to practice this. Yes the text content of the exercises will be “easy” but the point is just to practice the rules until you have learnt them.

Once you are confident you have learnt the rules, then practice applying it in your written texts. Read everything you write twice, checking you’ve applied it correctly the second time. Use a German grammar checker like LanguageTool to triple check for you until you are getting it right consistently.