Same here I’m a 50-year-old who had a blood clot in his pulmonary break and almost kill me so now I have to learn how to dig smartly and not chase every signal like I used to.
At first when I started about 10 years ago I was an almost literal "dig it all", hunter, the "What ifs" would really bother me if I didn't dig most of what I rolled over but that got old quick...or it did after about a year or so doing it that way.
Eventually I decided I needed to dig a whole lot less but somehow still find more so that high performance, dig only the better more solid stuff, started to grow in my mind.
I knew the only way to be successful at this doing it this way is to learn all my detectors as well as I possibly could so I would be able to notice the better signals that more often than not are masked or changed to not so obvious targets because mineralization, trash, other kinds of garbage and especially even small pieces of iron which can do that easily.
In our business I believe there are normal, obvious solid signals and there are other "solid signals" that aren't so obvious but they actually are there if you learn to notice them with the right coil manipulation and experience.
I learned a basic F2 so well and became so successful than many couldn't believe what I was finding...some still don't.
Eventually I settled in digging targets that never jumped more than 3 numbers with that one and my clad, old coins and especially silver and gold jewelry volume soared while my garbage digging volume dropped.
I had a Vaq and did the same but when I got a Compadre I liked that even better and spent hours learning it...most of that transferred over to the Vaq so got better at both.
I got an F70 and with all those settings and so much more power the thing was hard to tame at first but I still found a ton of the easy stuff as I learned and as I dove deeper into experimenting with those settings and got better at observing both the screen and the tones and some very out of the box, and yet still repeating, behavior, the not so easy to find great targets showed up more and more.
Now I have a Nox, too, and it has taken me a long time to figure this thing out and exactly how it behaves in this strange land I hunt in but I have still been very successful from the start with it and I am getting even more so with every hunt because each one is a learning opportunity to me and as I get better I find more great treasure.
All of this took many hours to learn all this stuff so well and I am far from done using any detector but every minute, every hour I spent learning it all was a labor of love and I found tons of great stuff all along the way.
As I reached certain plateaus along those learning curves things got way easier, more understandable and I continued to find more and more in sites that supposedly were totally hunted out by myself and so many others.
They never were hunted out...what was needed was someone to come along and unlock the secrets of challenging and difficult dirt and conditions.
There is always an answer, I believe, a key to every situation to unlock any puzzle so now it is just my quest to find them no matter how long it takes.
That is one of the great attractions about this hobby for me, I love finding all I do but even more I love getting challenged and then finding a way to conquer it and achieve success...but I am weird in that way.
I don't think any newbies can do what I do the way I do it and be as successful as I have been but I do believe anyone can learn to do it this way if they choose to and spend the time and effort to committing to actually do it if that's what they want, and need, to do.
I had to learn to do it this way, I had no choice because my time hunting was getting smaller due to life stuff, my energy levels were shrinking as the years passed and my patience for digging so much junk went down to almost zero.
If I kept going the way I was, despite having some great success, eventually I would have been chased right out of the hobby if I was forced to continue on that same, wheel spining path I was on.
Funny thing is as I learned more I spent less time, energy and effort digging junk and dug suprisingly way more better targets as my skill set grew...once I learned what I needed to learn my great finds grew exponentially and now what I learned I will have forever.
But I will still keep learning...that never ends in this hobby as far as I am concerned, and I will happily share all that I know to help anyone that needs to get to the next level.
I learned a ton from others in these forums and my hours of experience so I think it is my duty to pass it on...The circle of life in this hobby.
Experience + knowledge of my detectors and target behavior gained over time = success.
It's as simple as that equation...for me.
I can see you have some good reasons to avoid as much trash as you can, also.
Hopefully you can use some of these tips and great advice from all these members to do that to your satisfaction and still be as successful as possible.