My professional advice would be to ask for the BEST legal advice you can find.
See the link below for free legal advice for limited or low income families.
If you have questions about the contract that the Realtor is unable to answer, then I would ask to speak with their broker. Otherwise, depending upon the nature of the contract and the questions, it might bake sense to ask an attorney.
To put it another way, if you need legal advice, you need to speak with an attorney.