Where should I start with coding if I wish to become a full stack developer one day?

Have you at least started with any language? For backend you'd want either Java, Python, C#, or JavaScript/TypeScript. For frontend that would be JS/TS, with HTML and CSS.

maybe you should see page roadmap.sh

Javascript+HTML+CSS is a must. Then Python etc would be additionally helpful.

The Odin Project has been a great resource for a long time to dive right into web development: https://www.theodinproject.com/

It goes as deep as you want to and is very well structured and kept up to date by the community.

start by learning the basics of web technologies, one that are necessary no matter what framework you want to with in the future,

1. Javascript

2. Html/Css

3. choose any OOPL (Java/python etc)

4. Move to learning framework