Congrats on the new bike, it's a very nice one and I'm sure you will enjoy it.
Park tools is a very good resource and also searching on youtube often produces excellent results as well.
You might want to hold off on changing out your saddle until you decide about the drop bar option. Some saddles are more suited for different bike setups, i.e. bars lower than seat vs, bars equal to seat level etc.
Just something to consider.