The word Allah is often written like a calligraphy - with the dagger Aleph. There are several ways to achieve that in Microsoft Word or Libre Office.
Times New Roman or Arial are not the only fonts to write in Arabic. Google Fonts offers many beautiful Arabic fonts for free - it works also for Apple/Mac.
Many students are confused why words like هذا, ذلك or لكن are written with a dash (dagger Aleph). Should they be pronounced with a long vowel ("aa")? Yes.