Little help needed from trad astrologers

[Inconjunct]

As my signature says, I'm getting into classical astrology. Plenty of reading to be done. I'm looking at my natal chart and trying to work out the Lord of the Geniture. The almuten is Mercury, I think but he's in a cadent house and retrograde, not so good. Saturn is next down in essential dignity, but as he's situated in the 12th, is his power to act diminished or is it unaffected because he joys in this house? The candidate I've chosen is Jupiter as he's next down the list in terms of essential dignity, he's direct and in an angular house. Am I on the right tracks?

All help gratefully received. I'm on an iPad and can't see a way to attach my chart to this post, but it's in my profile, in the album marked "my chart"