Happy Easter to my Christian friends.

There was a giant old Victorian house (very decrepit) that used to show up in my dreams (when I could achieve real sleep).
I loved it.
Secret rooms, underground pool, huge library with a huge fireplace.
I want to go there again.
I might even meet Shaggy and Scooby

Can anyone out there help me with first steps - first steps - of creating an mp3?
I literally don’t even know what equipment is required.