As far as calligraphy goes I've always found it a lot easier to look at it from an artist's perspective. Practicing things like line control, line weight and general balance and uniformity will help you out a lot when it comes to making your writing look nice. Just having general control of your handwriting will put you a grade above most people. There are a ton of printouts and stuff online I'm sure you can find that would help with this. Making it look interest is another part of it, though, and that comes with experimenting and learning from other people's styles. Take a look at some calligraphy or handwriting galleries online and try to replicate what you see. Personally speaking, I've found staying relaxed and less focused on sharp, technical motions but rather soft, fluid motions to help out when signing stuff or writing in cursive/quickly. Learn the proper way to write but let it come to you.