Our charts share a couple of similarities. I also have a large stellium in Sagittarius plus the ascendant, Jupiter takes a super-ordinate position in the chart (with you, it rules all of your Sagittarius as well as being a singleton by hemisphere being the only planet on the western side of the chart - Jupiter is very important for you. It is also the cutting planet of your chart) and the majority of your planets are in the left hemisphere (I have all of mine there).
I think people may have a problem tackling your chart/question because not only are stelliums complex to interpret, but the questions you've asked of us are broad and unfocused. Is there anything specific you would like to know?
I'd start out by saying that the conflict between faith and doubt in your life is a primary point of concern, and that you may have a rarefied view of people/partnerships with strict rules/ideals on how they should operate, both intimately and in non-intimate settings. For you, beauty needs form, and you have a problem with the messiness that you see in the world. You aim for the stars because you cannot bare the earth. I wouldn't be surprised if you were often disappointed in life because circumstances don't measure up to your expectations or aesthetics. You may have dreams of a society that mirrors your ideals. This may motivate you toward social change or activism.