My first flight was went I went on my 1st honeymoon at age 22! LOL
Every airport is a tick different so I'll share with you what I know about Newark as I fly out of there fairly often.
You should bring some documentation on your surgery just to be on the safe side. But I'm sure that bit will be fine.
You will have to take off your shoes, any kind of sweater/sweatshirt you might have on, a hat if you have one and your belt. Those can go in one of the bins through xray.
If you take a computer, iPad or Kindle, that has to come out of your carryon and go in a separate bin through xray.
Earrings and a necklace should be ok to wear, unless they are huge. I have a watch with a chain band so I usually tuck that in my purse and put it on once I reach the other side.
In your carryon, no liquids. They have to go in a separate plastic bag and be of a particular size which I'm sure is in the tsa links above. I'm a smoker so sometimes I make it through with a lighter if I forget I have it, sometimes I don't. So try not to bring matches or a lighter. Hehehehehe
I think you can pretty much pack anything in your checked bags (regulations should also be in that tsa link) other than firearms, flamables or other dangerous liquids. Hairspray is fine.
In Newark, I wouldn't say they are not nice, but they aren't overly nice. They are kind of neutral. After you go through checking in for your flight, which is pretty straightforward, you then go to the queue for security. You should have your photo ID and ticket in hand (or ticket up on your mobile device) and before they allow you in line, they will check that, you can just show it to them.
Then right before the xray machines, there will be a TSA agent sitting there and you hand him your ticket and ID. He will check everything matches, scribble something on your ticket and then you get on line for xray. I would say at that stage, you should show him your paperwork from your surgery and explain the metal in your wrist.
Once you've got all your stuff sorted in the bins to send through the machine, you'll go through a machine. If you do set it off, and I've done it a few times, they might tell you to take off jewelry and walk back through again. Or just wave a wand all around and over you to see what is setting it off. You probably won't be able to take your papers from your surgery through the xray with you (they don't even let you take your ticket through...that goes with your other stuff in the bins). So that's why I suggest asking the TSA guy before you get to the machines for advice.
And yes, you can bring coloring books, crayons, reading materials or whatever you need to pass the time. And if you're lucky, they might be playing a decent movie for you to watch!
For me, taking off is the best part!!!! I love racing down the runway!!! And landings are fine too, just not as fun as taking off.
One of the other things I love love love is looking out of the window during take off and landing. I live about 50 miles west of the airport and depending where I fly, I can sometimes pick out my house from up there!
You will be fine Phantomcolt and I'm sure you will wonder what all the fuss was about once you're up in the air! I know that was how I felt the first time!
I hope you have a lovely lovely trip and a great time in FL!!!