I live in Abu Dhabi.i wish to marry a Muslim...

It is possible to marry a Muslim woman while converting to Christianity, so it is necessary to convert to Islam, and then it is possible to marry and if the first marriage still exists, so here are the requirements for marriage if converting to Islam:
** In the desire to marry, he must submit the following documents when going to the Sharia Judicial Department
1- Passports of married couples
2- Residence in the state
3- Providing a medical examination certificate that indicates freedom from diseases and an indication of the extent of fitness for marriage
4- The wife obtains a certificate that he is not reluctant to marry, and the matter will be through a review of her country's embassy and applying for it.
5- The wife obtains a certificate showing her marital status, which indicates if she was previously married, widowed, divorced, or single
** With the verification of the main pillars of marriage, the presence of the guardian or his representative in the event that it is impossible to attend and then bring two witnesses before the court and complete the procedures of the marriage contract, and that the marriage contract be approved by the court and the legal authorizations appointed by the court and the approval of it from the UAE foreign and the embassies of your countries

What is meant by the residency of the spouse is the husband and wife who want to marry her, even if she has a visit visa
In addition to the residence of the wife in the sense of the validity of the UAE civil identity for him, and in terms of procedures and other requirements, it is specific to the second wife and not the first wife