It is an excellent idea in fact.
- Start with Javascript, get the basics right.
- Get to know one or more frameworks for web development. Mark your favorite(s).
- Mark up and basics of styling.
- Start with doing small pet projects. Manage those in github.
- Share about your project and learning here in Hashnode.. and Learn more from the Community.
Year 2020 gives extra time to learn anyways. All the best!