I wanted to be one of those people who can say they learnt how to read Arabic writing on their own, so I was never coming close to giving up. They allow you to practice at a time, and keep adding more as you progress.
Their alphabet also gave birth to Hebrew and Greek, which is why all three scripts have some similarities. The Evolution of the Arabic Alphabet There are plenty of records of Arabic alphabet from the 7th century AD, and you can even notice traces of Aramaic, which was at that point mostly dead.
Above all, and this is the most difficult thing about Arabic is that there are three versions of each letter. The Arabic alphabet may have just 28 letters, but each letter has 4 versions! Anyway, it will come with practice. If you write an English word cursively, then you will also make certain changes to the letters.