No , because Khaleeji dalect is close to Fusha ( more than other dialects ) , in pronunciation and words /

For the native speakers of Arabic, it's not very hard because most of the "Khaleejia" 's vocabulary is common with the other dialects of Arabic. But there are some new words which the other dialects may not understand because it's not used in their daily language....And for the learners, it's definitely hard because of some new words and idioms... In general...It's not hard to understand this dialect...

what is khaleeji?

"khaleeji" is informal accents .. try to learn the formal Arabic first every one will understand that ..later on you can learn the different accents..by meeting people or through the TV Arabic channels

I speak Arabic fluently although I'm Korean but Alkhaleeji is not very hard if you know Arabic, Khaleeji is an accent so you only have to get used to it. BTW khaleeji is not just one accent there are 6 khaleeji accents (Kuwaiti, Saudi, Emarati(UAE), Omani, Qatari, Bahraini) ^^ so if you live in any of the gulf countries or have some friends from there then it's not hard believe me ^^ good luck