Pagan, by definition, is anyone who doesn't follow an Abrahamic religion (Judaism and it's derivatives like Christianity or Islam). It's derived from Latin 'pagani', meaning "Gentile" (non-Jew). Early Christians called anyone who didn't follow Christianity or Judaism 'pagan' in the same way Jews call every non-Jew "Gentile" or "Goyim".
In a narrow sense, though, paganism is three things:
-Worship of the Old Gods (symbolically, but there are nutjobs who think they are literal beings instead of symbols for different aspects of Nature and/or human psyche)
-Worship of the Ancestors
-Worship of Nature (arguably the most important part, far more important than the previous two)
Long story short, am I a pagan? Yes, theoretically. No, practically. Paganism is getting more and more organized through various religious organizations (Nordic Asatru, Slavic Rodnovery, Celtic neo-Druidism etc), while I see paganism as something which by it's nature is and should be free and disorganized. And I really don't care about the traditions like most pagans do, other than the symbology behind them. And the biggest reason, I don't intend to have a family, which is a key concept of paganism as a part of Worship of the Ancertors. I'm far too misanthropic for that.
I think you'll appreciate this:
https://humanisticpaganism.com/2013/03/03/pagan-atheists-yes-we-exist-by-stifyn-emrys/
https://m.youtube.com/channel/UCxPWgo_ujtjKT6vn1-Obm2g
https://m.youtube.com/channel/UCLM6JlQkQ9tltBL9Bipci9g
https://www.bitchute.com/channel/thuleanperspective/