Paramedic career

Hi everyone. I (34M) am a biomedical scientist (PhD level) who is looking for a career change. Let's just say that despite being quite successful at my job I'm being slowly but surely pushed out of academia, like many others.

I have a son that has some health issues, and we probably use more the ambulance than the car. The ambulance staff has been exceptional every single time, and I often found myself thinking I may quite like that job. I like the idea of going the extra mile to help someone, I thought that science would have been my way to do so but.. well it is what it is.

Looking online it seems like it is a very duable path for someone like me who cannot afford to be without salary for extended periods. It looks like you can start working within months.

What I'm reluctant about is the age, am I too old to start over in a career that is notoriously stressful and physically challenging? Would it be weird to be the only one in my 30s surrounded by much younger trainees?

I would like to know the opinion of someone that has done something similar, or at least by someone working as paramedic. I'm based in London if that's relevant. Thanks!