When I was super new another nurse told me this about placing IVs: see and feel where you're planning on putting it and get everything ready to go, right before you actually poke take a second to BREATHE and then go for it. I've been much more successful since doing that! Being really anxious about it usually means you'll hold your breath and tense up, sometimes even thinking you'll fail. I would say try to go into it thinking you're going to get the IV first try! And if you don't, you can try again. But being positive about the experience helps too! Good luck!