Maybe my Roland QuadCapture Audio Interface does what I need? I just found this:
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Sound Cards are one option for managing the input and output of audio signals in your Digital Audio Workstation.

They interpret and convert the assorted audio signals that are encountered throughout your home studio using components such as Analog to Digital Converters.

They perform the same function as you'll find in an Audio Interface.

One important note is that sound cards rarely have mic preamps, so you will likely need to take care of that with another piece of gear.
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Sounds to me that my Audio Interface does what a sound card would be doing? So my interface I just bought will give me a nice audio production and now I won't need some a sound card involved other than some basic card since this interface does the trick??