Thanks for your replies guys. The surgeon told me that I'll feel so much better afterwards as the pain now is unrelenting.
You know, I've been living with knee pain for around 6 years now and this surgeon was the only one who was able to immediately determine that the problem was with my hip and not the knee.
The Xrays he took very clearly showed that he was correct.
The procedure should take around 45 minutes, hospital stay 1-3 days, no driving for 6 weeks or so. I'm a bit concerned about recovery time as my leg muscles aren't very strong due to the pain and stiffness I have. Hopefully, I can recover quickly and return to a normal training regiment.