[zitterbewegung]

Use glitch.me to build a personal website which will teach yourself how to code and will teach you not only the basics but also what is involved in basic web development. Focus on HTML and CSS.

Mobile apps have a higher barrier to entry and you should focus making your personal website responsive so that you can design for screens.

Add a blog to your personal website and when you have to learn something first learn it and then write it down. Learn JavaScript at this point to automate the creation of blog posts.

Once you believe you know enough to make a project that you can do make a prototype on https://glitch.me and move to the paid tier. Then name the project and buy a domain from google / AWS . Then learn about authentication.