I think you should watch reality TV shows, people speak more natural.
I mean people talk more like that, in movies people say sayings you do not normally hear.
Watch with subtitles, if you hear a word that sounds interesting, write it down somewhere, and try to learn the meaning and pronunciation. This is what HiNative is for.
That is what I am doing for learning Vietnamese. I watch TV show or listen to music, then write words that sound interesting and try to learn from there.