First, congratulations on your purchase! Ultimately, if you're happy with the coin and enjoy owning it, that's what matters most.
You made a good observation on the variety. It is indeed a Small Date, Large Fraction, and BN refers to its Brown color designation.
There is, however, some fairly significant post-mint damage present. Unfortunately, the extent of the damage would likely prevent most third-party grading services (TPGs) from encapsulating the coin, and it may not meet their standards for a straight grade. From a grading standpoint, I would estimate it in the AG (About Good) range, although the damage would be a significant factor in its overall desirability. The R4.5 rarity does add some premium and makes the variety an interesting one to own.
I'm curious, was there a particular reason you chose this example? One of the things I've learned over the years is that condition plays a significant role in long-term collectability. Damage, regardless of how interesting the coin's history may be, will always be a consideration when it comes time to sell or upgrade.
Depending on what you paid, you might have been able to find a somewhat nicer example of a Draped Bust cent in the $50-$60 range. That said, every collector has a different approach and budget.
My advice going forward would be to buy the best example you can comfortably afford, even if that means waiting a little longer to find the right coin. A nicer example will generally provide greater enjoyment and better long-term collectability.
I'm sure every time you look at it, you see something different. I'm sure your coin has an interesting story behind it, and that's part of what makes collecting early American copper so fascinating! they are my favorite series to collect.