Replying to Adaptive sit-skiing before normal skiing during recovery from knee injury?

I bust up my knee pretty bad back in July while skiing - tore my ACL, MCL, PCL, Meniscus, Patellar tendon, and fractures to my femur and tibia. I'm 4 months in to recovery after my first operation (patellar tendon reconstruction), and have my next one (ACL reconstruction) planned for mid feb.

6 weeks after my next operation is my last university ski trip before I graduate, and the thought of missing it is crushing me. I would LOVE to still go along, and ideally learn to sit-ski. I was just wondering if anyone else had experience (or knows someone who does) with learning to sit ski after an ACL reconstruction - is 6 weeks realistic or is it far too soon?

Any knowledge/advice would be greatly appreciated! Whilst I'm an advanced skier (instructor), I have zero experience with sit ski's, so I don't know if just the movement or risk of toppling over would be too painful/risky 6 weeks post-op. Thank you!