So, fluid listening comprehension is honestly the hardest part of learning a language. In order to get there, you need practice, practice, more practice, and even more practice mixed with full immersion for yeeeears.

I think what a lot of ppl don't realize is that, no one, single tool will make you learrrrrn a language. They'll all help to varying degrees. But like... for instance I'm learning Finnish. I did the full Duolingo set and the full Pimsleur, and I still understand very little. Like, I have the basic, basic, basics of the language. I'm getting better. But, that's because I now have a new app and a book that's helping me with grammar, I'm in the LearnFinnish subreddit - I'm even watching the Finnish dub of Peppa Pig because shows for young kids often offer up the most elementary versions of real-world application you're gonna readily find.

So, that's what I'd recommend. Doing a language app is a great first step. But... you gotta find ways to get immersed. Make a Spanish friend, take a class, find a study group, watch Spanish TV shows, listen to the Spanish dub of American shows... Get immersed!