I, a wintard doesn't know how to use Bash // please help

[LeRatman]

I'm a bit of an idiot who swears by Windows, and this is one of the only times I've dared use Bash (via GitBash). Upon entering test txt for single image generation (bash stylize_image.sh ./image_input/lion.jpg ./styles/kandinsky.jpg), I get the following error; bash: stylize_image.sh: No such file or directory. What did I fuck up? please let me know.

Thanks,
"RatMan"