It happens. But if you have anxiety issues, I wouldn't get any more tattoos. They are never going to be perfect, and you won't do yourself any good obsessing over them. You will just drive yourself crazy.
You have a nice tattoo there. Just enjoy it.
Also, don't show the artist the tattoo on Pinterest. Just tell the artist (if he is good enough to do hands well) what you have in mind, and let them give it a go.
I am a woman, and I felt this kind of thing when I finished my first full sleeve on my right arm. I got over pretty quickly, then I completed my left sleeve.
You'll get over it.
I have a much larger version of Prince's symbol on my left arm. I got it the day he died. You can cover it with something bigger, but you can't fix blowouts. Still. It is far too soon to tell.
THIS. Hahaha.
I covered my first tattoo with a better one when I was 40. Now, I'm 48, and I have two full sleeves and my lower legs are both covered. I also work in a professional office environment (ad agency), and no one cares about my tattoos.
There is nothing wrong with how it healed. It just needs a touchup. A lot of tattoos need touchups. They aren't perfect.
After getting this touched up, I strongly suggest you do not get any more tattoos. This is all part of the process, and you don't appear to like or understand the process.