The pictures aren't great and the fact that you can't weigh it or measure it is not ideal. That being said, I don't see anything that screams "fake" to me. I also am not an expert.
Welcome to coin talk. I hope you don't/didn't purchase any coin without verifying authenticity. Many fakes are out there. I'm not saying your coin is fake, just a heads up in case you weren't aware. Wait for more knowledge to show up.
Can you take it out of the plastic holder? These photos have so much glare from the holder it is difficult to get a good sense of what the coin looks like, in particular the obverse.
I think the coin is: Septimius Severus AR Denarius. Struck 198-202 AD. Laodicea mint. L SEPT SEV AVG IMP XI PART MAX, laureate head right. COS I I P P, Victory advancing left, holding wreath and palm. RIC 503a. RSC 96. If you search septimius severus "COS II PP" RIC 503a you can find many examples to compare with online. I have no opinion on authenticity. If you are interested in or are actively collecting ancients I'd read this page by @dougsmit Fake Coins
If you can, take it out of the holder and look at the edge. I’m not sure, but I think you might see a seam running down the middle...
If you have it with you, then I'd suggest to take it out of the holder and take the pictures again. Weight and diameter will help.
A really obvious seam is shown on this terrible fake from my page. I am trying hard to resist offering opinions of coins I have not seen in hand. Fakes occur in a hundred levels of quality. Some fool no one; most have their believers and doubters. The one below is really bad. It came to me as part of an old collection group. Fake ancients were common a century ago and still are.
