Guidelines in Typography to Get You Started
The most basic things that you should learn
Using text size or leading as guideline
The baseline will make everything pop into place
Tracknig is used a lot but seldom noticed.
Left aligned or justified?
The golden cut as a guideline for distances

Be sure to check out the video The Golden Ratio & Fibonacci Numbers: Fact vs Fiction.

Always design with spreads in mind
The usage of a grid layout
Typical setup for the first pages

Form and situation can replace all these guidelines.

Always follow your judgement over the guidelines.