Start blue then go for rift scuttlers as these are the easiest to take with blitz bad jungle clear get ur self lvl 3 and a red buff then pressure mid. When you have enough gold for boots of speed and a stalkers blade you can recall as these two items help ur ganks A LOT. Stay away from raptors and krugs before you have ur cinderhulk as these camps are hard to take as blitzcrank. In the early game you should focus ganking and only taking rift scuttler and ur buffs as you will probably just waste HP and time on the other jungle camps. Before you have ur mobility boots, tear of the goddess and cinderhulk you should tax the lanes a bit when you gank because these are really important for ur ganks.