For learning Dogri language it is necessary to know alphabets in Dogri. You have to know alphabets in Dogri to learn writing in Dogri language. Dogri alphabets are the building blocks of Dogri language. There are 48 characters in Dogri alphabets. Dogri alphabets are made up of Dogri vowels and Dogri consonants. The Dogri alphabets contain 12 vowels and 36 consonants. Dogri vs German gives a comparison between Dogri and German alphabets.
Dogri script is also known as Dogri writing system or Dogri orthography. The set of visible signs used to represent units of Dogri language in a systematic way is called Dogri Script. The Dogri language uses Devanagari, Gurmukhi, Perso-Arabic script i.e. Dogri alphabets are derived from Devanagari, Gurmukhi, Perso-Arabic script script. The script decides the writing direction of the any language, hence the writing direction of Dogri is Left-To-Right, Horizontal. Learn Dogri Greetings where you will find some interesting phrases.
Is Dogri hard to learn? The answer to this question is that it depends on one's native language. One should start learning Dogri language with Dogri alphabets and Dogri phonology.
Time taken to learn any language that is mentioned here is the approximate time required to learn specific language for the person who is proficient in English. You can also go through all Indian Languages and find if Dogri is one of the language of India.