I'm one week and 2 days out, almost the same as you. First 5 days post-op were rough, not so much from pain but from nausea and headaches. Last few days have been much better.
I went right to crutches post-op. Went from 2 crutches to 1 after 5 days. Went to a cane yesterday (8 days post-op). I'm pushing rehab aggressively and know my biggest challenge will be patience.
I was comfortable w/crutches, having had to use them fairly frequently due to various sporting injuries. Steps can be a bit tricky: you'll need to hold on to a rail with one arm and put both crutches under the other. Going upstairs, lead with your good leg, then simultaneously bring up your bad leg and the crutches. Make sure someone is directly behind you. Downstairs is different: hold on to the rail with one arm and put both crutches under the other arm. But lead with your bad leg AND crutch. Then bring down your good leg. Make sure someone is in FRONT of you.
I use the one crutch (and the cane as well) on my good side. That was counter-intuitive for me.
I don't think crutches will be that different from the walker for you. Make sure you don't rest your armpits on the top of the crutches. It's a rookie mistake, and you'll get sore quickly! The top of the crutch should actually be a couple of inches below your armpits, and your weight should be born by your arms (and legs), as opposed to your armpits. Good luck.