I agree with OP, pick the hyped framework if you want to learn or get a job. If you want to build then use tools you are comfortable with. Django is not going away, I would say it would still be around in 10 years but latest hype framework is less likely to be around in 10 years.

Even Nicolas Taleb talked about it in more general terms. Bible is more likely to be around in 2000 years than latest bestseller.

It's python, any competent dev can pick it up very quickly.

I would additionally advise dropping the front end Javascript stack. Serve rendered HTML and CSS as much as possible.

Django is still relevant and will be in the future. I wouldn't worry about that honestly.

Getting revenue is problem nr° 1, so focus on that.