Learn both. Spring boot takes more time to learn, because you need to understand spring core first, then spring MVC, then build tools like maven, pom (to truly master spring boot application deployment) One specific technology is never going to land you a job. Go for the whole stack. Example, organizations that use spring boot, won't just look for candidates with spring boot. They might ask for docker, Kubernetes, JavaScript, some ui framework like angular/react, maven, git, etc. Learning curve for python django is easy and small. Focus one technology at a time. Learn it in a couple of weeks. Then go on to another technology in the stack. If you master multiple stacks say java stack, data science stack, web development stack then you should not be short of opportunities. More opportunities means more bargaining power. Having said that, don't run behind money. Money is necessary to sustain but it is not worth pursuing. Pursue moral values, or at least technical excellence. And money will follow wherever you go.

Globally, Spring Boot is more demanded than Django. For example, there are about ten times more open positions for Spring Boot than for Django in Brussels. So this naturally drives up the price of developers mastering Spring Boot. If you have an opportunity to work with Spring Boot, I suggest you take it, as it is a sound career decision. Furthermore, your experience with Django will help you to master Spring Boot, as both frameworks share many concepts. That said, Django positions do also exist, and it's absolutely not a bad decision to become an expert with that framework either. Django developers seem to like it very much.