New hobbyists are often hungry to learn as much as they can about metal detecting.
My advice to them is check the public library for metal detecting books. Your library catalogue may even be accessible on line from home. You can see what they have and sometimes if you find a book you want at another library they can get it loaned out to you.
There are many, many books out there on detecting. Charles Garrett has written many, Dick Stout, and many other authors to look at.
While you are checking the library look also at books about the history of your town, and maps – that way you can locate the old coins or other treasures.