Learning Hebrew calligraphy
Getting started
A sofer works on parchment with kosher ink. You can use these materials to learn on, but they are immensely expensive, so you are better off starting out with ordinary calligraphy ink on ordinary printer paper.
When you are ready, move to learning the letters for safrut. Learn the letters and the halakhot of how to make them simultaneously, otherwise you will form bad habits. Here is a worksheet, and you can find videos on youtube. From this point, having an expert look over your work now and again will help you, but it is still mostly about practice.
Left-handed people: you have it harder learning English calligraphy, but you will have a fantastic time once you start doing Hebrew.
Quills
This is a good video about cutting quills, and youtube is full of others. Alternatively this is a useful guide to cutting quills.
Now practice a lot. Use Google to learn some basic knife techniques, they will make your life easier.