How to correctly size a custom cart icon for mobile view?

Hey guys, I followed the coding method to change the cart icon in the homepage to a custom one I saved from online. The new cart looks fine on the website when viewed through a computer but when I log into my store through mobile, the icon is super tiny and practically not visible to the eye unless you really squint and look for it. So it won’t be the best look for my customers when they access my site through their phones. I made sure the image was 32x32 pixels which I think is the required sizing or am I wrong? Can anyone help me out? How can I have my custom cart icon be the proper size on both desktop and mobile view?

Also would anyone know how to change the color of that cart image so I can change it to a color that matches my theme?

Thank you, I appreciate the help.

Can you please share store url?

www.seibellamiami.com