I posted at about Week 14 that I was feeling "almost normal." I've been doing most things for much longer than that. The key is to really take the first six weeks very easy. You'll be tired. Your brain won't want to think about complex things (reading doesn't hold interest for many people). So follow the Bonesmart way of resting, icing, elevating, doing gentle movements. Begin adding normal activities in slowly, and take advantage of tools to make life easier. Shower stools, electric carts in stores when you are first venturing out, and prepare some meals in advance or have very simple meals planned. Prepare your recovery "nest." And have everything you need or might need nearby. I moved into my dining room which has a full bath off of it (moved all dining room stuff out, moved a recliner, TV, DVD player, clothing, etc in). This meant I didn't have to move to do basic things. I didn't have to climb stairs for the first month. Think of ways to keep it simple and prepare as much as possible in advance. You'll miss something. No big deal.
You'll experience the blues intermittently for the first three months. By 12 weeks, most people (but not all) are feeling reasonably good. Six to eight weeks tends to be tough time for many people. They're feeling better, but not great, and they're frustrated at how darn long it takes. When you get to that point, things will slowly start getting better. Patience is essential. If you don't have it, your knee will teach you. Grin.
Normal is different from everyone. The horrible bone on bone pain you're feeling now is gone nearly immediately. I noticed it the first time I stood up the same day of surgery. I've been elated ever since because of that, but I do have some ups and downs. Mostly, it's been good for me, and I've never for an instant regretting doing it.
Keep asking your questions. I'm sure others will chime in with their experiences about when they found "normal."