No issue with knees? Good luck. Both of my knees are done. The left one got so swollen that i couldn't bend my leg. The black and grey on my right healed better, but it still hurt a lot.
Knee and elbow ditches? Piece of piss.
It'll be fine. I had an infected tattoo once, and it was nothing to do with the artist. After antibiotics, I got it touched up a few months later, and it is fine.
Going this week to get my knee touched up, some small tattoos to fill in my legs, and some stars and dots. I haven't been to see my friend/tattoo artist Josh in over a year, so I'm looking forward to it!
I don't know how well that will hold up, especially if you don't find an artist that has serious skills. I would try to make that less ... busy? There's just too much happening. Way too much.