I would suggest that you try out for yourself. Try to follow a Django tutorial from beginning to the end, and if that's something you might enjoy doing.
Backend work is not "easier" than frontend, it's a different world where you have to learn to deal with other type of problems.
But I'm surprised that you think your job pool is becoming smaller, there is multiple magnitudes way more demand for frontend work now than in 2007. And it doesn't take much to learn about responsive layouts and React/Vue/whatever if you already have 14 years of experience working on frontend projects. Have you considered looking for a developer group with people who could help you get started with npm and other more modern tools? Nowadays you can get access to a lot of support by joining a Discord server, people are generally supportive and can ease your learning.
Backend work is not "easier" than frontend, it's a different world where you have to learn to deal with other type of problems.
But I'm surprised that you think your job pool is becoming smaller, there is multiple magnitudes way more demand for frontend work now than in 2007. And it doesn't take much to learn about responsive layouts and React/Vue/whatever if you already have 14 years of experience working on frontend projects. Have you considered looking for a developer group with people who could help you get started with npm and other more modern tools? Nowadays you can get access to a lot of support by joining a Discord server, people are generally supportive and can ease your learning.