ORC:
A refresher course would be a good idea shortly before an assessment drive, but in honesty the art of reversing comes only with a lot of practice and repetition. You need to land regular driving work first, hopefully out of a big yard where you can learn the art relatively safely.
Have you thought about going part-time? Keep doing what you’re doing to ensure a level of regular income, but free up a couple of days per week to go out on agency driving work? Most agencies are looking for experience, of course, but there are some who have clients who will take on rookies. Keep calling them until you find one who does.
Confidence comes with time, not with the licence, and to lack confidence at the start is a good sign that you are aware of your limitations. If you can make sure that your competence stays one step ahead of your confidence at all times then you’ll do just fine.
Good luck! 
Thanks for the input mate,some very wise words there.
I wish i could afford to go part time,but with living by myself and with a mortgage i could only do alternate weekend shifts except for holidays. My boss would get awkward about it though but i will defo keep it as an option,especially in the new year where jan-march is dead for work in my job,possibly just like driving though. I really do need a reliable income at the moment and with the state our corrupt countries in i cant risk a leap of faith.
Much of the problem though is that my hourly rate in my present job is actually pretty good for what i do and its better paid hourly than the bulk of class 2 work in this area. If i was on minimum wage id be out like a shot and would just do whatever driving work i could. I think once i find a reliable agency that can guarantee me a couple of days a week at least then ill be speaking to my boss and see if we can work something out.
A refresher course is a good idea provided it wasnt too expensive. The place i had the assessment drive with told me i was free to go back for another assessment once id had more experience but i havent a clue when that would be especially with needing to get better at reversing. Looking back now if id have waited and given myself chance to shift this crappy infection and gave myself more room at the start of the reverse i might have been ok,but whats done is done.
I dont regret getting my licences at all but wish there was an easy way of getting started. Theres a few places around here i havent tried yet including a couple of recycling firms near me that mainly use rigids so that may be worth a try. Once place (a metal recycling firm) did say he would have loved to take me on regardless of me being a newbie but his insurers would need me to have held my licence for 2 years. Im assuming things get a LITTLE easier after holding it for that time? Along with a bit of experience too of course.
I guess the best thing to do is not stress and grab some weekend shifts when i can,so long as my bills are paid and im gaining a bit of experience in the meantime when i can then ill just bide my time and see what happens. I really would love to drive hgvs for a living though,im sure the chance will come if im patient enough.