My first question is, how do I find my dominant planet? At CafeAstrology it speaks a lot of dominant planets, but I'm not sure how to tell what's dominant in my chart.
There's no one clear system for sorting out which planets carry greatest weight. I know there's a common site online that calculates dominate planets, signs and houses for people (is it CafeAstrology?) and I have no idea what equations they use for it. Zarathu - a poster on this site and longtime astrologer - uses a system called Astrodynes to rank the power and friction of planets, and I can't do that calculation either (though if you run PCs there's a program on the web to download if you want). Greybeard - another poster and longtime astrologer - has stressed the "leading planet" in the overall shape and structure of the chart, which I think in your case might be Mars, but since you have a sort of panhandle shaped chart I might be wrong.
A common way of finding the strongest planets is following a dispositor chain. You have two planets in the sign that they rule: Venus in Libra and Pluto in Scorpio. All the other planets will dispose to signs in a chain that will eventually lead back to these two (and the chain to Venus involves more of your planets.)
In my life I have noticed that the planets near the cardinal angles of my chart - Ascendent, Descendent, I.C. And M.C. (1st, 7th, 4th and 10th house cusps) - are very powerful in shaping my psyche. That gives Mars, Uranus and Saturn a lot of power in your chart. When it comes to your outer personality, because Mars is rising (conjunct your Ascendent) the energies and traits associated with that planet will be very pertinent to your life.
So you have a lot of candidates there, and it depends on what system you want to use.
At this point, other astrologers, better than I (I'm no astrologer) will hopefully chime in and begin to solidify some things.
But let me give just one peice of initial analysis anyway - and despite my qualification that I'm no astrologer, I think this is a deep theme in your chart and so I suspect it is or will be in your life. And it goes to the point about love life, in a way, being perhaps an illustration of my earlier post, where I tried to suggest it's not a question of "Will I have a bad love life?" for example, but the deeper question of your experience with relationships in general.
Quick, Initial Bit of Analysis:
I started my astro-education with the lunar nodes, which I think is a bit like jumping to Grade 12 math when you're still in kindergarten. But I still find the nodes are the most intuitive place for me to start, though it might not be for others. Your North Node is in Aries, but in the 7th house, which is the house associated with the opposite sign of Aries: Libra. Which makes your South Node in Libra in the 1st house (the house associated with Aries). More, the planet that rules Aries - Mars - is rising (1st house) and Venus is in the sign it rules, Libra.
There's too much I could write just to explain what those concepts all mean, put together like that. But I strongly suggest you start thinking abotu your chart by thinking about how it is calling you to balance Mars and Venus, Aries and Libra, 1st and 7th house, and all the things they stand for.
Aries and Libra (and the 1st and 7th house) can be thought of as poles on a single axis. (Think of a spectrum with pure Aries on one end and pure Libra on the other.) the theme of this axes is Self and Other. What is me and what is them? How do I relate with other individuals but stay true to myself. In fact, with North Node Aries in seventh house I'd say that's a great question to start with when thinking about the themes of this chart. How do I both live in equitable relationships were we all get what we owe yet stay true to my own individual wants and needs. This theme suggests a strong diplomatic streak but the need to learn greater self-assertion.
But of course, every chart is profoundly complex with numerous themes seemingly waiting to be discovered, some harmonious, others seemingly contradictory or having nothing to do with each other.
I only suggest a place to start, but I do think the Aries-Libra axis is a big one for you, and balancing Mars and Venus.
Also... (as one thing in an astrology chart leads to another, and another, and another..) that Venus of yours is in the 2nd house, traditionally associated with Taurus. And your Moon is in Taurus. Taurus and Libra are both traditionally associated with Venus... So even as I harp on about Aries-Libra, I think the Taurean aspects of Venus will be prominent in you as well. That too, though in a different way, also, would tend to run against your Mars.
I'd start with homework on Mars and Venus, and the signs they rule (Aries, Libra, Taurus) with a close eye on that balancing act with the nodes in Aries/Libra, 1st/7th.