Which technologies to learn first?

I'm interested in learning more about the following technologies and I was wondering which to start on:

I might start by reading our existing repo:
- Docker - https://github.com/dwyl/learn-docker

- FoxPro
- C#
- React
- Angular
- SCSS
- NoSQL databases (RethinkDB, CouchBase), RabbitMQ and SQL Server.
- Rancher

@iteles @nelsonic - I don't know if you have any suggestions.