Get Component in Specific Child?

I got two audio sources attached to “player”, I want to access these and be able to play these audio sources, what do I do?

You can create a AudioManager script and attach it to your player. In this script you can create two AudioSource variables as serialized fields so you can assign values to them via inspector. After that go to your player GameObject and assign the AudioSource components to the variables of the AudioManager and that is it, now you can control them via script.

For exemple, to start playing the AudioSource call the method AudioSource.Play().

To get more info on how you can control the AudioSource component via script check this link: https://docs.unity3d.com/ScriptReference/AudioSource.html