It is best to go to a lawyer. Issues such as property, support, custody, and access can be very complicated. A lawyer can help you find out what your legal rights are. They might also be able to help you reach an agreement with your spouse about the issues related to your divorce so you do not have to take those issues to court. If you are not able to reach an agreement, your lawyer can help present your case to the judge in the best possible way. You have a better chance of getting what you are entitled to if you have a lawyer.
Even if all you want is a simple divorce, it is useful to consult a lawyer. They can advise you about your personal situation and help you get through the court procedure more smoothly. For a simple divorce, you could decide to go to court without a lawyer representing you, but it is still worthwhile to consult a lawyer first.
If you can't afford a lawyer, you usually cannot get legal aid for a divorce. But you may be able to get a legal aid certificate for custody and access or support issues. These issues can be dealt with apart from the divorce or together with the divorce application. You should contact Legal Aid Ontario to apply for legal aid or to find out if your situation can be covered.