The most efficient way is to watch films or short movies in arabic with english subtitles and try to be familiar with the pronunciation and the phonetics :) and try to have some native speakers to discuss with.

Start with Modern Standard Arabic, don't listen to others who tell you watch movies or such stuff, Arabic has many dialects but standard Arabic is standard in all Arab or non-Arab countries.

speak to native speakers

سلام عليكم، كيف أحوالكم ، انشاء الله اموركم بخير. و ماحال اللغة العربية في تحسن؟

Arabic language it' Easy to speak usually need 3-5 month to understand Arabian people what they are say , but Difficult to write