First of all you are not an idiot DE. Plus I know that you have a lot of people around you who would be willing to help you. Me included. I haven't done OTEN but I did 4 years at uni on campus and 4 years off campus through correspondence.
Like the others have said the TAFE/OTEN teachers treat you like an adult and guide you through any issues you have. Correspondence usually means that there is lots of reading but it also means that you can do it at a time of the day that suits you.
More importantly you need to have faith in yourself. I know that you can do anything you put your mind to!