Hobbies are more important than ever, as gardening is not a weekend activity anymore but a survival need. Unless in a big community, knowing a little bit of everythong is more important than being super expert in one thing. So start learning about gardening, about carpentry, electronics, tailoring, study biographies of famous people to learn about leadership.
It will be harder to source good learning material, but books and offline resources will likely be available. At least you don't have to buy equipment if you have good looting sites.
You also have a whole world to explore! If you are careful you can explore places and have fun living in the wilderness