Welcome to T-Net!
Treasure can be tiny.
Practice. Both in learning your detector , and in recoveries.
The thing you dig up impatiently and damage will be the valuable one after a streak of junk. Don't worry , you'll ding something eventually even being careful.
Don't rub coins. Carry a pill bottle with paper towel or cotton balls for padding to put them in to carefully clean later. And study cleaning before cleaning. Sometimes a little can be too much.
Oh don't worry , you'll wreck a coin too eventually.
While learning how to make recoveries focus on blending where you did so when you are done so the disturbance doesn't show. Yes it takes patience and experience. But it's good P.R, in public areas.
And good to do when you are recovering relics so someone else can't tell at a glance where your homework discovered a site within a site.
Find comfortable gloves that protect your fingers. Use them when making recoveries. Or else you will get cut or poked or find dried dirt stuck to your fingers when you rub a sweaty eye.
Don't worry , you'll do something like that eventually.
You find a pair you like , get another pair or two.
I have a habit of dragging a finger to lightly mark a pinpointed area. That fingertip wears fast. Tried a golf tee (no I don't golf) but it just didn't get it for me after misplacing it enough times.
A generous pocket or pack pocket for trash and one for keepers. Pill bottle in keepers pocket. Check discards /trash later at home very carefully. Eventually there will be a surprise in your trash. And eventually or sooner (don't worry it'll happen) a keeper will have crawled out of it's pocket into your trash pocket by some mysterious method still unknown to detectorists.
A roofers type nail apron can be handy for such. Be aware the tops of the pockets are open!
If doing cartwheels or handstands you might lose something.
Don't worry , eventually you'll get home and be missing a recovery you had in hand earlier regardless of how securely you stashed it.
Your detector goes in your hand or securely in your vehicle after you step out of your home.
Not on the car roof. Not leaning against the many things it can be leaned against at home or on hunting sites. Worry. You won't like the feeling of where's my detector.
and show you what are there benefits 
