that's not quite true insight, there are many different types of therapist -please don't lump us all in the same bag.
To work in a hospital you have to be qualified and state registered.
you may like to look at the work of occupational
there are a number of ways to train in the uk -this may be different for other countries:
you can study for a Bsc (first degree)
if you already have a first degree you could take an accelerated learning course (2yrs) and get a post graduate diploma or an Msc.
you could take an unqualified position (e.g, recreational worker, occupational therapy assistant) -and take the in-service training route (4yrs)
I work in mental health, but our profession is represented in all areas of healthcare. If you try your local hospital, the ot dept should be willing to let you spend a half day with them to learn more. Personally, I love it because we get to do the practical stuff , working closely with patients using a client centred, holistic approach that enables
try the following websites for more info...
good luck with it all, I hope you find what you are looking for...