I am a noob, please help me!

[Nachteule]

Yes, it will.

I'm also using a Hifiberry sound card - this one https://www.hifiberry.com/ampplus/

For configuring your RPi see here https://www.hifiberry.com/guides/configuring-linux-3-18-x/
That's you have to do for getting Hifiberry sound running.

One additional note: If you want to use LIRC and Hifiberry at the same time, you have to reassign the LIRC I/O pins because Hifiberry and default LIRC configuration uses the same GPIO pins.