I am under limited contract but I want to resign...

If your inquiry is about that you are working on a fixed-term contract, and you want to be independent in order to join another job:
According to the UAE Labor Law, a worker cannot terminate a fixed-term contract before end of its term.
If the worker terminates a fixed-term contract before the end of its term, compensation must be paid to the employer which must not exceed one and a half months' salary.
Moreover, terminating a fixed-term contract before the end of its term is considered illegal, and the employer can impose a ban against the worker for a period of one year.
We recommend you to negotiate with your employer in order to obtain a no-objection clearance to move to another company, so that to avoid a ban.
The UAE Labor Law, in regards of your inquiry:
Article 116
Where a contract is revoked by the worker for reasons other than those specified in Article (121), he shall be required to compensate the employer for any damage the latter sustains as a result, provided that the amount of compensation shall not exceed half a month wage for three months or for the remaining period of the contract, whichever is shorter, unless otherwise stipulated in the contract.

The Ministry of Human Resources and Emiratisation does not sometimes impose a ban on owners of some professions and you should review the Ministry of Human Resources before resigning in order to ensure the extent of the possibility of imposing or not imposing a ban against you if you terminate the contract of work for a specific period before the end of its term according to your profession and in all cases, you will pay the compensation value, the value of which does not exceed a month and a half salary as a maximum, and we remain on our advice to negotiate with the employer in order to terminate the contract of employment in a friendly manner