LibreOffice - unlike Microsoft Word - does not offer to change the color of Arabic diacritical marks (tashkeel/harakat). However, there are two tricks.
With a simple trick you can add Arabic subtitles on Netflix. You don't need any plugin or add-on. It works on all devices. A step-by-step guide.
Writing formal letters and emails in Arabic is not difficult: Sentences and expressions for the last parts of a letter.
Writing formal letters and emails in Arabic is not difficult: Sentences and expressions for the most important ingredients of a letter: the salutation (المخاطبة) and opening sentences.
Reading grammar books in Arabic can be challenging if you cannot decode the language of the grammarians (i'rab/إعراب). But there is a formula.