I've been pumping over 3 years now...
First thing to remember is that a pump is only a delivery system, it's not a 'plug and go' nor a magic wand the pump will only be as good as it's user..
Work Load..
What sort of start off and how hard this will be really depends on several factors..
If you've got a very good understanding about your diabetes, alreading know the in's and out's about carb counting, know why and what is causing you to struggle with MDI or why it's failing you are likely to fair better, also if you understand the principles of pump theapry all makes for an easier start off..
You have also got to be prepared to do the necessary testing involved pretty intense at the begining, with fastings testing involved to pin down basal profiles, then re-working out carb ratio's etc... If you aren't prepared to commit to doing this then you'll find that a pump will become a very expensive piece of wasted kit indeed as it won't make an iota of difference to your control..
If you are willing to put the effort into it all you will get
A piece of kit that will improve not only your control but your quaility of life no-end it can give you so much more flexibility than MDI, and the more stable your BG's are the better you feel overall..
I actually started to feel the benefits of my pump in the first week I just felt so much better in myself, purely because my BG's were reasonable stable and I didn't have one hypo when I'd become accustomed to having several a day, a week without an hypo brought me to tears.. My HbA1c's are now down into the 5% range.. I suffer the occasional mild hypo and if I tell my husband I'm high I mean that my BG is 7 mmol/l
As to whether you will be able to get a trial pump will depend on your clinic, different clinics have different procedures... From how they issue a pump, how long it takes to get it, the training given and how you start, some ciinics start pumpers off on saline in the pump others like mine you go straight onto insulin...
But if you want to get a notion to what wearing a pump is like, get a mobile phone, a piece of wool/string/ribbon which about 60cm long (most used tube length) stick one end to the mobile phone and the other to yourself, such as the stomach area.. It will give you a jest what it's like..
If you decide that a pump is for you, a book called Pumping Insulin by John Walsh is a very worthwhile investment (£20 I think) it's know as the pumpers bible..