OP doesn't mention what class they are flying, so I'm assuming Economy on QR.
If so no access to Al Mourjan or Al Safwa (which are the two very nice lounges in Doha)
As flying QR no access to Oryx (only those flying BA, RJ and UL).
So access would be to the QR First lounge as Emerald and QR Business lounge as Sapphire. From what I've read there isn't substantial difference between the two.