Does anyone else feel that they will never learn this difficult language? When I look at the English language am amazed how people learn it with so many different meanings for one word!
The lack of genders and cases, not to mention the relative simplicity of the verbs (compared to the romance languages) makes it a lot easier. Every language has words with multiple meanings, it's just that you only become aware of that when you are past the intermediate stage (unless you make a conscious effort to look it up).
When checking word strength, I actually feel as if I have not seen some of the words before. Perhaps I inadvertently jumped a course. My internet goes down often which can be distracting but that's Africa. I am considering going back to the beginning as I realise that I have not taken full advantage of what Duolingo is offering.
Even English people have problems with the language. That's why there are simplified, phonetic reading systems for kids. As others have said, don't be discouraged. Take it one step at a time and, if you have a genuine interest and keep practicing, you'll get there. Try not to focus on the difficulties.
In the 1980's, when I was learning English, I had the benefit of full immersion. I feel that despite its irregularities, it doesn't have complex enough of grammatical structure for those irregularities to present the kind of obstacle they could. I think the most difficult aspect of English is how it expresses fine-grained distinctions with vocabulary instead of phrasing or neologism via word component combination, which demands a vast vocabulary. For all the talk of Inuit having twelve words for snow, English actually does, mutatis mutandis for almost anywhere a hair-splitting distinction could be made.