Well, for all of the above, I’d personally recommend using Linux Mint to get started. I’ve always found that it’s too much work to debloat Windows, and it’s considerably less secure than Linux (normally).

Most Steam games run on Linux, but there are a few that do not. Music production could also be a bugbear, as a lot of popular software does not run. You could always try using WineHQ to run the Windows versions, however, or try a compatible alternative.

If you simply must run Windows, you have two options. Dual-booting is a good idea, as this lets you select whether you want to boot Windows or Linux when you turn on the computer. Another option is using a virtual machine; this would allow you to run Windows inside Linux. For this, I’d recommend VirtualBox to start with.