The first thing to note is the corrosion. Aka, the green spots. Those almost always give what we call "details" grades.
Second, is to get a "photograde" book. It does not really matter what edition you get; at this point. All you are doing is trying to build the base on your knowledge. We all had to start somewhere.
Your coin is probably somewhere in the fine range. Or would be without the green spots and red sploches.
So it would in most likelyhood be called a "fine details" coin.
At this point, and for such a common coin, it probably has no value above face or its value as copper.
On a rare coin such as a 1909 S VDB Lincoln Wheat cent
, those spots would still give it a details grade, but the coin would still have quite a bit of value.
Don't be afraid to post pictures. Yours were just fine. It is the only way to learn
Good luck in your future hunts