I thought the movie was okay. The surreal and horror elements were interesting. I had some issues with the basic story line, as well as the character development. Interesting trailer for Avatar 2, but it didn't wow me as much as I thought it might.
As a small side note, Screenrant is saying that the first trailer for Avatar 2 is reportedly going to be shown before this movie.
https://screenrant.com/avatar-2-trailer-doctor-strange-2-release-details/
I read a couple of Doctor Strange comics as a kid way back in the 1970s. Might try to look some up if there are any online. I'll also probably read some of the long wikipedia entry on the character....
https://en.wikipedia.org/wiki/Doctor_Strange