magento2 – How to alter the customer checkout/login popup or process in Magento 2.4.1?

I am needing to alter the way the checkout process works on a Magento 2 site because the site offers quotes only and therefore I do not want any mention of the term “Checkout” in the traditional sense. So basically I am trying to either alter what is displayed in the default checkout popup (screenshot below) or show different content altogether.
enter image description here

I have been searching for a module/extension to achieve the results I am looking for but I have found nothing.

It has also been suggested that I remove everything within the click function in the login-popup.js (see code below) and add this:

window.location.href = ""

Can anyone explain exactly what and where I need to replace this in the code below?

function ($, authenticationPopup, url) {
'use strict';

return function (config, element) {
$(element).click(function (event) {
var date = new Date();
date.setTime(date.getTime() + 420000);
$.cookie('login_redirect','quotation/quote'), {expires: date});
return false;

Any other ideas or direction on how to change the content of the default popup would be greatly appreciated also.

I hope this makes sense.

Thank you,