Most probate matters require hiring an attorney to proceed. You should contact a local probate attorney and simply ask if hiring an attorney is required for a probate estate - I would be surprised if the answer is no. It is not the attorney's choice, it is the rules of the Court that control what cases can be "pro se" (no attorney) and those that require an attorney.
Mr. Post is licensed to practice law in KS and MO. The response herein is not legal advice and does not create an attorney/ client relationship. The response is in the form of legal education and is intended to provide general information about the matter within the question. Oftentimes the question does not include significant and important facts and timelines that if known could significantly change the reply unsuitable. Mr. Post strongly advises the questioner to confer with an attorney in their state in order to ensure proper advice is received.