I think for me Fux's book on counterpoint may not be applicable for first time composers, since counterpoint can be real difficult even for more advanced composers, and some of the species counterpoint inside Fux's book may not be applicable to newer music. It can work as an excellent guidance, but sometimes you will see Bach violates those rules, since Fux bases those rules on Palesrtina style of counterpoint, which will be even stricter than most Baroque period music including Bach's. I would rather recommend you to read the book "Harmony and Voice Leading" first to get to know the chord progression first. To write with Baroque style, Bach's music is always great example for it. Just listen to his Well Tempered Clavier, Brandenburg Concerti, Orchestral Suites, Sonatas and Partitas for Violin, Cello Suites, Goldberg Variations will allow you to get a glimpse of Baroque style. Vivaldi's violin concerto or Handel's Music for the Fireworks will be great too!