Hard to tell what's going on from a recording like that, nor is it easy to know your expectations. You need an SPL meter to measure properly. I come from a WRX with 3" turbo-back exhaust with some of the cats missing, and the Forester in comparison is closer to an EV in terms of noise in the cabin.
I'll just add to the voices to say that the DI system clicking is the dominant engine sound you hear with the hood up while idling. It's nothing to be worried about. I've heard the same thing on other DI cars. I guess a 2000 psi injector makes some noise when it works!
I've found the cabin in my XT to be nice and quiet with only moderate background engine hum. If you give it some throttle, a distinct turbo whistle is heard, which is a nice touch, but nothing I'd call "loud".