Early game mining setup on a Skyblock ironman profile?

Get to the Dwarven Mines as early as you can, that's where mining actually starts. Before that, the mithril in the Deep Caverns gives you enough to crack a Mithril pickaxe, and the first few Heart of the Mountain levels matter more than any gear. On ironman you can't buy your way past the early grind, so put your first tokens into mining speed and fortune and ignore the fancy perks until later. Commissions are your main income down there, do them every day.