For starting out the biggest piece of advice I woud offer is to ask questions and ask again, until you understand the answer. When you get the proposal, read it through, have a cup of tea and then read it through again. Ask more questions .......
It is not an easy ride ... nor is it impossible. PMA is important (Positive Mental Attitude) ... see the IVA as a tool to debt freedom by repaying what you can, not as a means to pay as little as possible.
And communicate --- some firms see communication as a chore -- ride their backs, tell them of any problems and changes, ask them any questions and demand answers. It is your IVA, not theirs. Drive it and own it.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014