How to start building a full javascript stack web-app hosted on AWS?

My objective is to create a web-app using MERN or MEAN stacks and host it on Amazon.

Now, I need help with the logic/structure/architecture because frankly, at the moment I don't even know where to start. I've been a web developer a couple of years, using PHP, javascript jquery and other web technologies but never dived into full stack solution development. Now I wanna give it a try. I'm still learning mean/mern components but I'm pretty sure I'll get there.

What I wanna achieve is simple: a web-app (really really simple website) where if I (the admin) go to a specific url (for ex. mywebsite.com/admin) I can login and add stuff similarly to a Wordpress website but much more simplified. I need to add a title, a description a button and maybe 1-2 pictures, save that information into "a product" and generate a custom URL for it so that when someone clicks mywebsite.com/productnr1 it will go to that specific product with the information I added previously. In a few words, I want something similar to Wordpress but much more simpler using one of the mentioned stacks.

Is there anything like this on the market? Can someone suggest a point to start? My main problem here is the http protocol and how to generate custom links for products.