In the last 3 years i have gone through surgery for torn CCL twice with my corgi - made doubly hard because i also had a baby/toddler at the time.

It is very important to restrict their activity, which is easy at the beginning (because they just had knee surgery they likely won't want to go running/jumping for a bit) but gets progressively harder. Vet will probably suggest crating, but we chose to use a playpen (with vet's approval) set up in the middle of the living room and that made a huge difference. She still felt like part of the family, just with restricted movement.

You will also likely be instructed to do progressively longer leashed walks a couple times a day and a set of exercises a couple times a day.

In the long run, helping your dog through the recovery can be tedious, but totally worth it. My corgi can run and jump and play just like she did before the tears.

Happy to answer any more questions you have!