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.
here in this post you can find the roadmap and lists of tools and resources that are required for the following paths:
https://redblink.com/become-full-stack-developer-2019-roadmap/
- 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)