For me the pump itself was the easy part. It's just a big automatic syringe with a programmable timer. The treatment regime is far more complicated than the actual pump.
The infusion sets are the critical link, so I advise you learn about the different types of infusion sets and why people use them. In my first 6 weeks on the pump I was experiencing problems with about 1/2 of the infusion sets I used. I switched from the teflon canula to stainless steel manual insertion and all the problems vanished.