The easiest is, when you do get stuck LOL (not if !!) just scream for help here and you'll get it.
But the mainest main thing out of all the main stuff is always -Do NOT panic! LOL
(Oh and when you discover you hate it, a few weeks after you start, don't give up. You CAN sort it out, actually, it's only logic - just a different sort of logic from what's ingrained in you from being on MDI. Pump logic will replace it - well actually, no not replace it - ADD to it very soon!)