Good surgery will give early recovery and normal life No exact time frame.. Everything depend upon fracture reduction, fixation and soft tissue condition

Its a bicondylar fracture, it can be normal in future of reduced correctly and fixed it. Needs regular follow up and physio

With proper surgical fixation and rehabilitation, most patients are able to return to a near-normal daily life, including walking independently, though recovery is gradual. Non-weight bearing is usually required for about 6–8 weeks, sometimes longer depending on fracture severity and fixation stability, followed by partial and then full weight bearing as advised by your surgeon. Overall recovery takes 4–6 months, with strength and endurance continuing to improve up to 9–12 months. because the fracture involves the joint surface, there is a risk of knee stiffness and post-traumatic arthritis in the long term, but good fracture reduction, maintaining knee movement as advised, and adherence to follow-up significantly reduce this risk. The CT shows multiple fracture fragments rather than a single crack, which explains the need for surgery, but at your age, outcomes are generally good with proper care and patience during recovery.

Operating Surgeon will explain u better, Follow he's advise and Do Surgery