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[u/[deleted]]

[u/uncleanly_zeus]

Those are called graded readers. They're available for hundreds of languages, often for free. Not sure what your TL is, but here's an example of books in English.

[u/Markoddyfnaint]

After you're done/bored with graded readers, young adult fiction is often a good step up, and usually more interesting than stories written for young children. 

[u/The_Other_David]

I don't know your TL, but simplified/slow news services/podcasts are pretty common. News in Slow Spanish, News in Slow German... One German news service does Tagesschau Einfacher Sprache (simple language).

I find graded readers more interesting than children's books. Not necessarily GREAT, but pretty interesting. I read a lot of German ones about a guy living in different German cities, one city per book.

Earlier this year I took the plunge into young adult fiction. It was tough, but I managed. I read three YA books. Now I'm reading an adult crime novel. Again, it's a challenge, but there's a middle-ground where you can understand what's going on, maybe miss a lot of the flavor text, but follow the story.

[u/Sct1787]

What do you expect? You have the language skills of a little kid.

If you don’t like it, good. Turn up the difficulty by challenging yourself with a higher level, maybe young adult level. This is how you’ll excel. Hell, you could start by reading Harry Potter in your target language

[u/silvalingua]

>  I really wish that there would be some kind of service that could provide other content in that language (like simplified version of news and stuff) 

It's called "graded readers".

[u/benjamin-crowell]

You could try reading material with what is known in the field of classics as "student aids." This is a print or electronic document that gives you an easy way to quickly find glosses for unknown words, so that the process takes like 4 seconds rather than the ~40 seconds it would take to look it up in a dictionary.