Like the rest of my fellower ppruners say it really does boil to hard work. In fact even if you have a light foundation or bias towards scientific subjects then there are some useful publications and CDs out there that should help get you upto speed. But I think most can get by without the need for these.
I know quite a few people who have left existing professions (non technical) that have gone on to become pilots both in the UK and overseas, so yes it most certainly can be done.
With all the support of tutors and excellent course material you can get your teeth stuck and the sooner you start the sooner you finish. If there are some tricky patches during the learning phase don't worry you won't be the first person!
Best of luck my friend...
