since you are from Morocco, start with Spanish and you can trip to North, up there people are so familier with Spanish. in addition, Spanish spoken in many countries. 

Tu peux regarder les spectacles de Gad Elmaleh (comedian)

Thanks Leen for ur cerrections

Arabic is influence in Darija more by amount of words, but most of this words are changed in pronounciation and seplling, e.g verbe (akala(past), ya-akolo (present), sawfa-ya-kolo(futur)) became (kla(past), ka-yakol(present),(ghadi yakol(futur)). 

berber is influence in Darija more by grammar,

French and spanish are influence in Darija by words and some letter P, G ect..

ex of words in Darija from :

berber (Tamazight): BZAF (much), SERJM (windows), AMOUSH (cat), TASAROT (key), LALA (lady)....ect

french: (portable , moteur, prtma (appartement), tomobile, kokot (cocotte)) ect...

spanish: semana (Week ) ect...

" daba kheSS-ni ndderrb n-nuTqa dyal kull had shi " 

Good, and if u need help I am here to help you.

Note: Darija is not a written language, is spoken,and u can use latin alphabet, I personality use alphabet french for write it and most Moroccan use latin alphabet to write in Darija when send messages to each other or chatt on whatsapp ect..
phrases like you should write by using arabic alphabet and we only write by using arabic is just relating to a race issue, this issue is not important to Foreign learner. Moroccan is not arabic country, it was originally a berber country (the history said that), and Darija is a mix of berber( grammar that uses in Darija is the same uses in berber ) and arabic, french, spanish and some words came from others languages.

of the beggining of my life until now, I only talked to one Chinese girl for 15 days and she was nice and friendly. So I don't have deeply knowledge to answer ur question.

https://www.youtube.com/watch?v=Dl6dnqoYbjY

- qamija (shirt) : come from word camisa (which a spanish word), just letter C changed to qa.

- Sbata is an arrondissement of Casablanca, in the Ben M'Sick district of the Grand Casablanca region of Morocco

wa7ed juj tlata,
bba msha l sbata,
shra li qamija,
ana w khti khadija

khadija khadija tal3a lbir

katshrb siro

n3na3 w shiba ......

If you need something in Darija just send me a message and you'll get the answer.