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I am new to stamp collecting
Excellent. Welcome aboard! It is a rewarding hobby.
That said, there are basic tools of the hobby which greatly add to the enjoyment ... tongs, perforation gauge, watermark tray/fluid, catalogs, albums, etc. These are a much better use of your $50.
To expand on Don's post, the odds of finding the next 596 are extreeeemely long. Like Powerball odds long. Scott 596 has several look-a-likes, which were the workhorse stamps of this era produced in the billions, yes, with a "B".
Identifications by previous collectors should always be taken with a grain of salt. Always re-check with a critical eye ... especially if it is ID'd as something better than normal.
It is worth setting these two stamps aside to study and learn from them with the proper equipment, etc. To carefully confirm the perforation rate (which if the images are non-distorted, both appear to be 11 x 10.5, thus Scott 632).