Listen to a native conversation. Transcribe it as one long string of sounds. You will notice that natives smush words together ("Did you" becomes "Dija," "Going to" becomes "Gonna"). Stop fighting the smushing; embrace it. That is the rhythm of fluency.
“So, like, I was going to call you, but, um, I totally forgot. You know how it gets.” Speak Like a Native
Pay attention to where the tongue sits. Is the language spoken in the front of the mouth (like Spanish) or further back in the throat (like German)? Listen to a native conversation
Native speakers don’t just choose words; they choose "chunks." We don't say we "made a mistake" because of a rule; we say it because those words live together. A non-native might say they "did a mistake," which is grammatically understandable but sounds "off." Stop fighting the smushing; embrace it