vedic astrology

So after knowing some correct prediction about my business/career, I have developed interest in Vedic astrology.

though it is a fact  that only very few astrologer are genuine and give correct prediction.
I would like to be associated with those types of astrologers.
there are certain very interesting facts while analyzing about marriage/relationship in one’s chart.
there is one important planet and its Venus.
so i got to understand more about Venus and its position in the chart while analyzing the chart.
my questions are -

1. (in a girls chart – is it Jupiter or Venus to look for the partner/relationship)
2.if mars is aspecting the venus it might be love marriage. and jupiter aspecting venus it will be an arranged one. what if both the planets are aspecting the venus.
3. what role the seventh lord play.?
4. why when mars is sitting with Venus is bad. and lead to divorce.
5. if Venus is debilitated or in between malefics what are the remedies.?

thanks

horo