Austria to HRE
Europa Universalis IV
Unlike the Brandenburg to Germany run where you conquer provinces directly from the start, Austria's early game is built around establishing personal unions rather than direct annexation. Your first two are Bohemia and Hungary — Bohemia through war, Hungary through the Archduke of Austria / King of Hungary event around 1455. If the event doesn't grant you the union for whatever reason, you'll need to go to war for it too — call in your allies, Burgundy especially for a good measure. Two crowns either way, no need to paint the map just yet.