I don't think that the Court will require you to hire an attorney but the Court will require that you file all proper paperwork and follow procedures correctly. Termination of rights, etc., involve serious rights so the courts want to make sure they are done correctly before terminating a parent's rights (and responsibilities).
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That is a tough battle to take on with no formal training. You will waste more time and money trying to do it right (because inevitably you will not meet a certain burden). Try to pony up some money and hire a lawyer even if it is an inexperienced lawyer to help you. Check your local Craigslist under legal services for services. But short answer is no, you don't have to hire an attorney. Look for an adoption lawyer.