There are many ways you can go about picking up the skills you need to become a developer. And then there are massive lists of skills - and sometimes lists of resources - you can use to "choose your own adventure" through the learning process.
https://redblink.com/become-full-stack-developer-2019-roadmap/
here in this post you can find the roadmap and lists of tools and resources that are required for the following paths:
- Front end web development
- Back end web development
- DevOps (also known as "site reliability" - this is sort of an evolution of the old System Administrator role)