Perhaps I am rather negative. I am in my early fifties and have had a fascinating career culminating in a senior role in legal medicine so I have no moans or groans at all about my career.
The reason I would counsel caution is that the very brightest go into medicine because it is so competitive; they then have to compete with each other all the way along . We worked very long hours but were well looked after and relatively well paid. Young doctors in the NHS are badly paid for what they do, rotate around huge regions at short notice, are in effect low grade shift workers. Age for age paid much the same as a nurse (lots of examples on doctors.net one comes to mind of and A and E registrar the clever sister working in the same A and E as her sister a nurse. She and the sister were on the same salary although she had spent many years training).
There is a huge regulatory burden involved in training (talk to any junior doctor). About 25% have given up by F2: that says it all in my generation perhaps only 5% or less gave up medicine as junior doctors.
I have researched careers quite a bit recently as older son just left school, now doing a run through MEng in Chemical Engineering, leads to much more flexible global careers and actually better paid.
Do remember that doctors in this country now are public sector wage slaves run in the NHS by managers who wouldn't have got in to read medicine.
Having said that if you go into it with your eyes open then very best wishes.