Just an opinion here. I would say that it's very probably it would get easier as you build up the muscles in your leg. That said, it's still quite easy to do further damage to the ligaments in the knees since they are already hurting. So, slow and easy build up in that area may be a good idea. Do a few still, but don't push too far. Maybe only do 10, but then try to do another 10 later in the day. Something like that.
There's also the idea of adding in lower impact leg exercises. Bike riding, even a stationary one. Maybe swimming. Doing the squats in the pool shallow end. In addition to squats, you could strap a small weight to an ankle. Then lift up with that foot.
Some people may suggest Chondroitin, or Glucosamine/Chondroitin pills. Some say it helps, but there's also studies done that show it has no effect on arthritis sufferers. So decide on that for yourself. I know, if you live in the U.S. you can get 20 Chondroitin pills at the Dollar Store for a buck. So it's not that bad to try out and see if it helps you.