Struggling with the 'sz', 'cz', and 'ś' sounds—am I overthinking this?

As someone who records themselves daily, I'm finding the distinction between these Polish consonant clusters incredibly difficult to hear and replicate. I keep listening to native recordings, but when I play back my own voice, it all sounds like one long hiss to me. Are there specific tongue-placement exercises that actually helped you improve your clarity, or is this just a result of not having enough listening hours?