I did not know how to post this page, now I am experimenting this way !
Traditionally astrology learned through these steps
1 - Horary astrology
2 - Electional astrology
3 - Natal astrology
4 - Mundane astrology ...etc
When one understand first and second one (easiest) , then he can develop enough tools to handle more difficult ones 3rd and 4rd etc...
Also, Not everybody ask full birth chart reading , then I break it down as :
Horary , electional , vocational , medical(not good this one yet) reading etc... Studying different branch of astrology gives me wider understanding whole ....