I have 3000 aed fine with alcohol drink outside...

If the fine that was issued against you was through a court ruling, then the judgment must be appealed by way of opposition or appeal.
But if the Public Prosecution office issued the decision to impose a fine against you, you can apply to it to reduce the fine due to your weak salary, you must attach to your request a copy of the work contract.
The text of the UAE Penal Code concerning your inquiry:
article 313:
1. The prohibition of drinking alcohol does only apply on Muslims.
2. Without prejudice to the cases where it is admitted to Non-Muslims, whoever alcohol beverages shall be sentenced to detention for a minimum period of one month but not exceeding six months and / or to a fine not exceeding two thousands dirhams.
3 - Subject to the conditions permitted, shall be punished by imprisonment for a period not less than two years and a fine of not less than fifty thousand dirhams or one of those penalties, anyone who has won or made, brought, made, imported, re - exported, promoted or promoted alcohol for the purpose of Trading.
The penalties provided for in this article shall not prejudice the penalties prescribed for the violation of the permits or licenses and the conditions thereof