Although it is not necessary for you to hire a lawyer to act for you in the divorce proceedings, it is advisable to consult a lawyer first before commencing the divorce proceedings to understand the procedures and your rights, especially if your spouse does not agree to a divorce and/or neither of you can agree on the arrangements to be made for the children or financial matters.
If you are facing financial difficulties, you may try to apply for the Legal Aid Scheme administered by the Legal Aid Department.