Excellent advice from everyone!
As for temperature, I do not have a thermometer and I let the bullets tell me what is happening. Cold bullets may mean cold metal and/or a cold mould. I usually pour a dozen before getting too excited about turning up the thermostat on my cheap LEE melter.
My father taught me the craft at a young age by letting me observe. I can imagine BlitzKrieg was just like Dad- he was NEVER so strict with me. I watched from a safe distance, listened and learned well.
My grown son wants to learn the art. Perhaps this fall we'll cast all of the lead I have left.