HELP is there a way to remove/disable the pre-loaded HDRI environments in viewport shading?

hello. im new to blender and im following this tutorial of making a glass cup but with mine, it looks like a mirror cup instead of the one it supposed to look like. i thought i turned on/added something accidentally without knowing but even with creating a new object and trying to recreate the glass effect thing, its still the same. ive searched this problem on other websites but they only show how to change it to another hdri. how do i fix this please? i want to continue learning but i cant bc im stuck with my mirror cup ;-; thank you in advance!

my glass cup ;-;

glass cup im trying to follow ;-;