Reddit reviews Writing Arabic: A Practical Introduction to Ruq'ah Script

The book Writing Arabic: A Practical Introduction, while older, does a decent job of teaching you how to write and read ruq'ah which is what is usually used for handwriting. It might still be difficult, but this is one of the better resources for getting better at this, I think.

Get this: http://www.amazon.com/Writing-Arabic-Practical-Introduction-Script/dp/0198151500

There's no better book for arabic handwriting in English.
And this is probably the only one that treats the subject comprehensively.

This book is incredibly thorough and really helpful. It's kind of expensive, so I advise you to check the libraries around you for it (mine had it), but if you don't find it, here's a pdf. I recommend that if you can get a hard copy, get it though.

Part 1

Part 2

I highly recommend this book.

Don't learn by copying fonts or something similar. Learning from google image is also not the best idea, people write in different styles.
I my opinion you should stick with Ruq'ah. And if you will not be able to find something (certain connections between letters probably) in that book, search for some examples of calligraphy in Ruq'ah style and adapt it. There's many Arabic and Turkish sources, including calligraphy learning books.