Early hesitations experienced by home studio novices relate to the cabling. Understanding what cabling you need, and more generally what the travelling through your cables, is essential.

Here is a good video to give you the basics:

I would add to this video segment a word on the USB cable.
It tends to be the connector of choice these days…

In the home studio, USB cables play multiple roles:

  1. They provide power to your outboard gear (audio interfaces, keyboards, controllers, mics…)
  2. They can carry audio signal, but only in digital format (typically between your audio interface and computer)
  3. They can also carry MIDI information.

And these functions run simultaneously.
So, if you have purchased an entry-level audio interface or any type of recent keyboard, you will be using USB.

Enjoy!