What is the language to build a website to handle Authentication Payments and Databases

I would like some help form some experienced developers or coders. My problem is that i cant find which is the best way to make a website that has a good Authentication system and it can handle payments and store data in a data base and i was wondering anybody had a good start way cause what i have done so far is built the whole website in HTML and CSS and a little bit of JavaScript and i used Firebase to host it and ive tried the auth system but its not working and then i used there databases and i looked at the payment method and it came out to redoing the whole website with react base and more and the payment method was really crazy so i was wondering if anybody knows anything to tell me on like a good language that i can use to start it out and can import the a auth system and database to store like a ticket system and a payment method or any services to help me out or anything at all really cause ive already put like a 100 hours in this and i dont want to destroy it for nothing and anything would great right about now thanks if you guys have anything.