I have written a post here on how to go about studying Jyotish systematically. If you follow it systematically, you will be a really good astrologer in 2-3 yrs.
Here I am listing out the four essential books which you should have with you for reference.
- Bruhat Parashar Hora Shastra
- Bruhat Jataka
Do go through these four books in depth. You do not have to learn them by heart. Never learn anything by heart, instead try to understand, apply it practically see how the combinations work. Learn to use these as reference books. So that if you get a chart, you should know which combinations exist and where they are mentioned in these books.
Some other modern authors whom you should read are these few. This helps in gaining perspective.
- K.N. Rao
- C.S. Patel
- Shakti Mohan Singh’s epic book on Kaal chakra Dasha
Software will be necessary as most of the newer astrologers do not study the math involved. The best free software is Jagannath Hora. Paid ones are several but the best is Parashar Light. A daily panchangam is necessary too, I use Drik Panchang app on my iPhone. It has an android app too.
And practice daily, train your mind to see patterns. Be dispassionate and detached, you are now a student of human nature.
Wishing you the best in your studies.