Congratulations on your find. I'm sure it is a coin as in the first photo I can definitely make out the head outline of a figure, neck pointed to the right and face down. In the second photo not much.
As far as cleaning your coin, on this forum, first click on everything about finds, than to cleaning your finds. Lots of methoids and tips explained there.
I see your new to the hobby, welcome, good luck, and congratulations.
Don
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