I would say that if you want a profession that would make you more useful when the revolution comes, try and get into a career that is typically dominated by already wealthy asset owners.

Unfortunately, as these professions usually expect you to be making your primary income from said assets, this would likely mean relatively low salaries and lots of unpaid work, and serving bourgeois interests a lot of the time. However, having experience in things like civil service, economics, etc while being loyal to the cause would make you indispensable.

I say this because one of the common things I’ve come across in my research, especially with that of Cuba, is that once the socialists and communists finally managed to achieve and control state power, they’ve often had to make heavy compromises starting out in order to utilize typically unloyal actors from the recently disposed regime to handle running the new governnent, atleast for the first few years, because they were the only ones with experience in doing such tasks.