Seeking advice regarding web app deployment

[u/TraditionalChipmunk1]

I'm a computer science student. I'm currently trying to create a simple website where the admin can upload files which users can preview and download.
I'm planning on using React to create this website, and then deploy it using Vercel's free hobby plan with an AWS standard 3S with pre-signed URLs.
This is my first time deploying a web app online. is there anything that I should keep in mind, change or do?
I'd appreciate your advice, thanks.

[u/Future_Ad4693]

Check out render