Frontend Devlopment learning and exploring

I want to learn javascript from scratch but with professional perspective to learn and also I want to learn MERN stack from scratch with production level in a easy way , and also want to build a payment app with production level with third party integration which will run also in my local so write the project code also so that I can run it on my local to test and deploy it on server to use it , nothing should leave from interview perspective also , all things must be of production level so that I will be easy to work in company , structure wise also