some questions about general bread-making

These are some questions I would ask a baker:

Question: What is the difference between fresh and non-fresh yeast?

Question: What are the different kinds of yeast? For example, active dry, instant? Is one better than the rest?

Question: Does using a Dutch oven really help the crust come out crispier? Is it really a replacement to injecting steam like they do in commercial ovens?

Answer: Yes! I borrowed my friend Luke's Le Creuset Dutch Oven and it made a huge difference! The crusts crackled and crisped and looked just like store-bought bread, but better. Now I just need something like 300 dollars to buy one! ahem....

To be continued...