1. Well Django is also very flexible and powerful in the sense that you have to write less boilerplate code and gives you many solutions out of the box like admin panel, authentication and many more...
2. yes its true nodejs is fast as compared to django but tell me how fast? does it really matter?
3. Django also has concept like celery which are used for background tasks such as sending mails. A possible nodejs threading alternative.
4. In nodejs you have websockets while in django you have channels
5. You can do machine learning in both, nodejs also has tenserflow support and many other libs.

Conclusion: In my opinion you should go either with Django, laravel or Rails or something mature like that, Reason is nodejs web frameworks are pretty young in the market, where as django has been for more than 20 years now I guess, and same for laravel etc. Express is lot of boiler plate code, and as for nestjs, its also pretty young.

Hope my suggestion help you. Personally I also started with nodejs and now switched to Django. I am not saying nodejs is bad, its awesome but Time matters, if you want to develop stuff fast, then nodejs is not a good solution.