I'd make a duplicate copy of the recording, and use that to experiment with, then;
then reduce the volume to 25%
Then copy the part you want amplified to a file by itself
highlight part of the file like 33% of it raise the volume 130%
then highlight and raise the volume on the next third to 140%
then highlight and raise the volume on the last third to 190%
those are just suggested percentages try it, play it back, and readjust as necessary til it sounds right
then copy and paste into the final file