don't the multiple article translations trip you up, though? it did that to me when I was learning Italian
The problem with learning a language isn't really that its hard, more that it takes a long amount of consistent time to do. Also, you will make mistakes when you interact with others and a lot of adults quit because they are embarrassed of making mistakes and looking like an idiot.
You have the ability to learn a new language in a year; you just have to spend like four hours a day every day on it consistently. Most of that time needs to be spend absorbing the language, something like Duolingo will never be able to teach you a language to fluency by itself.
I would learn something like the 1,000 most common used words with vocabulary cards, then after that watch native content for children like Peppa Pig a few hours every day. Overtime naturally you just pick up understanding the language. Once you understand almost everything in the Peppa Pig episodes then it's time to move to shows for older children, then after teens, adults etc.
While you are doing this, I recommend getting some speaking practice as well, as understanding and speaking are two different skills. If you don't care about your accent, you can start right away with speaking classes with a teacher online. If you do want to sound like a native speaker I would start speaking after you have listened to the language, it seems to help. Doing things like repeating lines from native speakers from YouTube videos or movies and comparing how you sound (record yourself) with the native speaker can help you if you don't have access to native speakers.
Don't give up if you want to learn a language, it's more like a part time job. You're not failing to learn a language because you don't have the ability it's more that these apps are lying to you. They won't take you to fluency. Even with the best resources doing only 15 min a day would take like 30 years to learn whatever language you are doing.