This is good advice. A large toolbox containing different programming languages will allow you to solve some problems easier than knowing one language only. P

This is good advice. A large toolbox containing different programming languages will allow you to solve some problems easier than knowing one language only. Perhaps Rust, C, Python, Bash (for CI stuff). Find a pattern book and at read it to learn the basic patterns .. and anti patterns. If you only have a hammer then everything looks like nails .. Learn Ubuntu or some other flavour of Linux or *BSD. It's free and contains usually all the tools you need. This makes sense if you have the time to learn. Usually you have time to learn while young ..