Well, as a starter for ten there are three billion articles about pumps here: http://www.shootuporputup.co.uk/tag/pump/ 🙂
Like @Mike says, it’s a lot work – I found I had to “re-learn” diabetes. Everything I did on MDI went out the window. However, I found I was pretty stable within a few weeks and mastered it within a few months. Now I couldn’t live without it!