Hand lettering is a great skill to have because you can use it in many ways for scrapbooking and paper crafts. You can design your own fancy titles, sub-titles and easy to read journaling. You can make sentiment phrases for cards and minibooks. You can add brush lettered elements to your planners and bullet journaling.
This post from Jessica helps you to get started by providing you with the best basic resources you need. She talks about the difference between hand lettering and calligraphy, explains the various kinds of pens and markers you can use, and links to numerous free online resources so that you can do the most important thing: practice!