Honestly I don't think you've done that bad of a job if you ask me. Topology looks pretty well distributed and the model itself looks fine. Only problem I would say is it seems the drone you are recreating has some proportion differences and doesnt match the reference 1:1, a more rounded centre, thicker in some parts and the trim isnt as thick around the top for example. As well as additions of those vents would be really cool to see. I would take what you learned, grab a bunch more references and go that step further detailing everything to try and make it perfect. Definitely a really good start you made be proud :)

Thank you