Quick vocal edit

Hi - I have recorded let it go as a video for social media on my iphone 17 . Suprisingly it sounds very good and clear. However there is a word “blast” i need extending ever so slightly with vibranto added on the end inly needs extending for 1.5 seconds just the vocal. And then the word “past” again the same. If you could add a nice reverb and some good effects that would be good
too please but simple job, nice and quick as still needs to sound raw and live