It would be worth noting that the "Premium Lounge" is Al Mourjan, to which you won't have access flying in Y. While opinion here has been mixed, it's certainly one of the nicer lounges I think I've been in.

The "First Class Lounge" and "Business Class Lounge" to which you will have access have had exclusively negative play on this board, as far as I can tell.

If you're flying QR for the "Premium Lounge", I don't think it'll be what you're expecting, unless you're in J.