Check out this website as it may help ground you in the basics of traditional horary.
http://www.skyscript.co.uk/horary.html
For your particular question, click on the planets at top center of the page and it will show you the traditional rulerships. Saturn is the trad ruler of AQ. Ur, Nep and Pl are not traditional rulers of any sign.
Best,
Ah thank you so much!