As recommended by John Caputo (and myself) https://www.introducingbooks.com/ 'comic books' but they are a quick intro, and some not bad IMO.

If you are new, a quick historical overview is I think a good place to start, as you could spend several lifetimes exploring just one philosopher or one idea.

When I stated it was Bertrand Russell's History of Western Philosophy, but it's very dated now.

Beware of YouTube, unless by some respectable source. The Gregory Sadler ones seem OK.

Also many 'commentary' books on philosophers often have a bias.

The problem – or joy of philosophy is unlike science, (very) old theories are still very relevant.