Having said that, Now-a-days, I generally recommend these two online tutorials to Jyotish enthusiasts -
I must tell here that there are too many systems in Vedic astrology and no tutorial and no book can cover them all. At the end of the day, an astrologer has to devise his own methodology which suits him most. These tutorials will just help you getting basics and you should refer to the e-books mentioned in the related article section to improvise your knowledge further.
1. Astrology Tutorials by Astrologer Punit Pandey
2. Free Vedic Astrology E-Books
3. Krishnamurti Paddhati Tutorial
4. Vedic Astrology Books and Authors for Beginners