What still changes from one state to another are notary fees, set by a state table, the rules of the local Court of Justice Inspectorate (Corregedoria-Geral de Justiça), the organization of judicial districts and the structure of the Special Civil Courts. These differences are real and affect timing and cost. That is exactly why each state has its own page here.
Law practice in Brazil covers the entire national territory. Registration with the OAB (the Brazilian Bar) allows a lawyer to work in any state, and supplementary registration is only required when the lawyer practices habitually in another state section, under art. 10, §2, of the Brazilian Bar Statute. In practice, geographic distance is not, in itself, a legal obstacle.
Hearings followed the same path. CNJ Resolution 354/2020 regulated procedural acts by videoconference, and the "100% Digital Court", created by CNJ Resolution 345/2020, allows entire cases to proceed without in-person attendance in the courts that have adopted the model. The power of attorney can also be signed digitally, under art. 105, §1, of the Code of Civil Procedure.
Electronic court filing changed the rest. Since Law 11,419/2006, and today with PJe and equivalent systems in practically every court, filings, documents and deadlines are handled entirely online. Counter filing is no longer the rule, and no one needs to be physically near the courthouse to follow a case.
The routine combines an initial conversation, document organization and a defined strategy. Before proposing any lawsuit, out-of-court routes are considered: formal notice, direct settlement and negotiation are usually faster and less costly.