You cannot learn astrology on the Internet. Either you find a teacher, or you purchase the volumes of writings that will tell you how to proceed.  Both is good.

Most can be found at The Astrology Center of  America

http://www.astroamerica.com/ 

Below is a List of books that you will need to have to do the various aspects of astrology:


1.  General Traditional Astrology:  All the books by Ivy Goldstein Jacobson

        Amazingly, a good starter book is ASTROLOGY FOR DUMMIES by Rae Orion.  And at the other end of the scale, for psycho-analytic astrology:  SYNTHESIS AND COUNSELING IN ASTROLOGY: The Professional Manual by Noel Tyl.


But for a serious knowedge of basic astrology, you really need the Ivy Goldstein-Jacobson set:

        All Over the Earth Astrologically
        Astrological Essays
        Dark Moon Lilith in Astrology 
        Explain Me Why Astrologically
        Foundation of the Astrological Chart 
        From Outer Space to Planet Earth
        Here & There In Astrology 
        In the Beginning, Astrology


2.  Horary Astrology:  SIMPLIFIED HORARY ASTROLOGY by Ivy Goldstein Jacobson


3.  Relationship: ASTROLOGY OF INTIMACY, SEXUALITY, AND RELATIONSHIP by Noel Tyl, RELATIONSHIP ANALYSIS by Robert P. Blaschke, and THE ASTROLOGY OF HUMAN RELATIONSHIPS by Frances Sakonian and Louis Acker.  Except for Noel Tyl, all of these authors have died.


4.  Vocational Analysis:  VOCATIONAL SELECTION AND COUNSELING VOLUMES 1 & 2 by Doris Chase Doane;  PLANETS IN WORK by Jamie Binder, 


5.  Prediction: There are so many good ones:

        Combined Techniques:  PREDICTING EVENTS WITH ASTROLOGY by Celeste Teal, 

            IDENTIFYING PLANETARY TRIGGERS by Celeste Teal

        Solar and Lunar Returns: LUNATIONS AND PREDICTIONS by Sophia Mason,  PLANETS 

            IN SOLAR RETURNS by Mary Fortier Shea, SOLAR & LUNAR RETURNS by Donald A. 

            Bradley, THE LUNATION CYCLE by Dane Rudyhar,  THE LUNAR CYCLE by Francesca 

                Naish,  

        Solar Arc Directions:  SOLAR ARCS  BY Noel Tyl

        Progressions:  SECONDARY PROGRESSIONS by Nancy Hastings, PROGRESSIONS IN 

            ACTION by Doris Chase Doan,  PROGRESSIONS by Robert P. Blaschke(especially for 

            Minor and Tertiary Progressions,  DELINEATION OF PROGRESSIONS by Sophia Mason

        Transits: HOLOGRAPHIC TRANSITS by Robert Blaschke, TRANSITS:  Forecasting Using 

            the 45 Degree Graphic Ephemeris by Reinhold Ebertin, THE PRACTICE OF 

            PREDICTION by Nancy Hastings, TRANSITS by Betty Lunstead, 

        Primary Directions:  

        Midpoint pictures:  COSI(Combination of Stellar Influences) by Reinhold Ebertin,   

            PLANETARY CONTAINMENTS by Sandbach & Ballard,  

        Harmonics:  PREDICTIVFE TECHNIQUES IN ANNUAL HARMONICS by Charles & Lois 

            Hannan

        Diurnal Charts:  THE ART OF FORECASTING USING DIURNAL CHARTS by Sophia 

            Mason, 

        Eclipses:  ECLIPSES by Celeste Teal

        

6.  Asteroids:  The best on asteroids is Martha lang Wescott.  I recommend MECHANICS OF THE FUTURE, THE ORDERS OF LIGHT, ARCHITECTS OF TIME, AND the giant cookbook volume of asteroids, ANGLES AND PREDICTIONS


7.  Houses:  THE ASTROLOGICAL HOUSES  by Dane Rudyhar


8.  Rulerships:  THE RULERSHIP BOOK by Rex E. Bills


9.   Want to become an astrologer?  VEry hard to make any money at it, but if you are serious, there is a manual to tell you how:  ASTROLOGY: A LANGUAGE OF LIFE(vol. 3): A Handbook for the Self Employed Astrologer  by Robert P. Blaschke.


10.  Sun-Moon Blends:  SUN SIGN-MOON SIGN by Charles and Suzi Harvey


11.  Health Issues:   ASTROLOGICAL TIMING OF CRITICAL ILLNESS by Noel Tyl


12.  Harmonic Astrology:  HARMONIC CHART by David Hamblin.  This is way out of print so you will have to search eBay or Amazon to find a used copy.  I got mine from World Books in the UK.


13.  Vocational Astrology:   IN THE BEGINNING ASTROLOGY  and OUTER SPACE TO PLANET EARTH  by Ivy Goldstein-Jacobson;  VOCATIONAL SELECTION AND COUNSELING, vol 1 and vol 2 by Doris Chase Doane;  PLANETS IN WORK by Jamie Binder;  THE MIDHEAVEN EXTENSION PROCESS by Noel Tyl.  The best of the group is PLANETS IN WORK, but its long out of print.