The Jural Societies creating the Grand Juries are part of the solution, but there need to be two public meetings called in each County — one is an organizational meeting and the second 30 days later is a business meeting.
At the first meeting everyone is informed about what is going on and information about the jural society and Notice of the Public Meetting is given. This is also posted in the local paper(s).
At the business meeting elections for sheriff, judge, and coroner are held. The sheriff, after taking his oath as a constitutional officer, is free to deputize assistants and call trial juries.
The jurisdiction of the court is the land, the law form is American Common Law, and whomever is chosen as judge should be thoroughly familiar with basic due process and administrative procedure in addition to being well-versed in jurisdiction, law forms, venues, Maxims of Law, and the peculiarities of American Common Law. That might seem to be a tall order, but there are people out there competent to do it.
The fundamentals of American Common Law are easy enough for a child to understand, so other than reading caselaw for precedents it boils down to the founding documents, individual freedom, individual property rights, no victim no crime, and if you harm someone you are liable for it.
Otherwise, if it hurts nobody else, do as you will.