I had a right open partial nephrectomy on May 21. It's now right at six weeks and I am pretty much back to normal. My biggest problem was a pinched nerve in the opposite leg. Leave it to me to have a weird after effect from surgery.
Recovery was slow going but tolerable. I was home on the third day (a four hour drive, that was fun) and walked 1/2 mile on the sixth. I slept on my nice soft couch for a few weeks since our firm mattress was just too uncomfortable.
I was able to take care of myself right from the beginning, with a little bit of help getting up and down. The hardest thing for me was putting our dachshund outside. She goes on a leash and since she's only about six inches tall I could not get low enough to reach her.
I had a few weeks before the surgery so I shopped, cooked and froze meals ahead of time. I was well prepared so I really didn't need much help at all.
I was really surprised at how much easier it was that what I had imagined. You'll do fine!