Hi Ladies!
I picked up three different size calligraphy pens this weekend. a 2.0, 3.5 and 5.0. So, I've been working with all 3 and definitely go with the smaller point if you plan on doing any of this yourself. The 2.0 pen is working great and allows for a lot more individuality in the writing. The larger tips make it more difficult (at least for me, at this early stage in the game).
I'm going to keep practicing, but already like the way the 2.0 tip works with just my regular handwriting. Jazzes it up and makes it look more formal for the invitations.