Something that may help. Find a movie or tv drama that you really really like in Japanese .
And watch it 2/3+ times. Watch it initially without (Japanese) subtitles if possible. To not read but to focus on listening.
I am sure over time, more will become clear as you get used to the sounds / voices.
Preferably whatever it is, it is set in present day Japan so that the movie/anime/podcast does not have weird grammar or way of speaking.
Edit: Find podcasts or videos on YouTube and put them as background music. Ie passive listening
Eg when doing house chores or walking somewhere. In my opinion it does help