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I'm not sure about better
My ceiling was similar, I used a big U-shaped bracket and two large screws (pretty sure I got it from the same shop as the bag) something like this:
https://www.amazon.co.uk/Meister-Ceiling-Hanger-MMA-Punching/dp/B07BZX4HPS/
Next time I'd probably put a bit of mdf/ply with appropriate holes in it between the hanger and the ceiling to minimise marking the ceiling.
Finding the joists was the other issue...
@moocher I hadn't considered this. I think the ceiling is lath and plaster beneath ceiling joists. Do you think that would work better than going into the wall?
@Ndeipi I like the way you think. It would invade into our recently redecorated bedroom though.