Hi tammyt. I'm not sure if you mean that you were born between noon and 1pm, or midnight and 1 am. Either way, take the halfway point and calculate the chart for that time rather than just using a noon chart. Use the time zone and any daylight saving time as normal of course.
Venus in Aries develops self-love and self-worth by meeting challenges which test one's courage and independence. Since Venus is on one level the urge to be valued/desired, you'll perhaps be happiest with a partner who loves you for your boldness and adventurousness. And perhaps a relationship where you have adventures together, or meet challenges together, will make you feel better about yourself.
Your 7th house is quite complicated. The 7th symbolises experiences of partnering up with others on an equal footing. The planets and signs in that house show the energies that we will tend to meet through such experiences. I assume since you're asking about the 7th that you were born around midday and do know that you have Uranus and Neptune here. You may meet partners who embody these energies, especially Uranus because your chart is very watery and therefore you already have an affinity with Neptune. Both Uranus and Neptune are very idealistic, and you may need to be realistic about what a relationship can and cannot do for you. On the other hand, relationship experiences may open up whole new worlds to you.
I don't use Juno in interpretations, but any object in the 12th house may symbolise an energy that has been neglected or misused by your parents and ancestors, and which has found its way into your psyche through the very porous 12th house part of your mind. So it befalls to you to honour the Juno archetype. But since I don't know much about Juno, I won't try to interpret this any further. If Juno is similar to the 7th house in some ways, then Juno in the 12th may have a similar feel to Neptune in the 7th, perhaps making this a theme. One or both of your parents may have been quite Piscean because of the Pisces MC and possibly Pisces planets (including the Sun) in the 10th house. So any difficult issues around that parent could resurface through marriage to be looked at again.
Being so porous, the 12th house is where we are plugged into the needs of others. I think this is where the idea of a partner who needs help comes into the interpretation of Juno in the 12th. The 12th is where we may be asked to make sacrifices.
Juno represents an urge needing to be satisfied - an energy needing expression, where as the 7th house is an area of life-experience. The houses can be sees as the backdrop on a stage on which the planets/asteroids are the actors.
I personally don't think that karmic partner thing holds any weight.
Mars and the Sun are both masculine archetypes. The Sun symbolises the urge to be a unique individual with a special destiny. Mars is the aggressive energy with which we assert our need to be ourselves - the courage to confront obstacles that prevent the Sun from shining. The Sun makes Mars' efforts worth while by giving meaning to life.
Mars is sexual masculine energy and may describe what you will find sexually attractive in a male. The Sun is more likely to describe the kind of person you will admire and respect on a deeper level. Ideally, your partner will embody both, and indeed your Sun and Mars are both in water signs, so the watery male may be ideal for you. With watery Neptune in the 7th house, and your MC and Mercury also in Pisces, a watery person would seem to be attuned to much of who you are.
Your female personal planets, Moon and Venus, are both in fire. You are a fire/water type all in all. I wouldn't like to try to give you a detailed profile of your marriage partner. It may be more important to you that he is watery and sensitive, than fiery and optimistic, though ideally he will also be able to relate to your fiery female planets.
And then there is the question of whether or not you will look for your less emphasised elements (air and earth) through a partner - generally the tendency to look for the under-emphasised elements in a partner increases with age once we have gotten to grips with our stronger elements, but this is not a hard and fast rule.
Looking at the psychology of each of the types in a book like Astrology For Lovers, by Liz Greene, or Astrology, Psychology And The Four Elements, by Stephen Arroyo, will stand you in good stead to understand what each type needs and what dynamics are likely to arise between people according to their elemental biases.