I did this within the last year. You should download DB Poweramp from their website. It works with High Sierra and after, so you should be ok. You might need to ok downloading from a third party source when downloading. Make sure that your computer and your Aurender are on the same network. You should be able to format the SSD from inside of Conductor. I ripped and downloaded all of my CDs previously to a network server, but you can rip directly to the Aurender. It should show up on your network. Go through the conductor ‘Settings” menus in order to understand how network/storage..etc… all works. It isn’t that difficult. I’m older than you and just got back to two channel equipment/listening last year. It isn’t that complicated. In general you can make mistakes along the way and learn. That is what I did.
If you find it easier, you can rip to a local computer drive and then just copy and paste the ripped files to the Aurender’s SSD.