Welcome, meganlove!Could you post the synastry chart, please?
It's hard to read with two separate charts.
I bet his time of birth is unknown to you?
It's a bit problematic because we won't be able to know his houses or the exact position of his Moon.
But oh well, still better than nothing.
Now, onto your questions.
1. I personally haven't studied Lilith very much so I'm not sure if it's a good thing or not. They aren't conjunct anyway, so I wouldn't pay much attention to it. Planets are more important, in my opinion.
2. Juno is a tricky one because depending on the astrologer, it can signify the ideal marriage partner or the "mistress". But if his Juno is in Scorpio and your Moon is there, it may mean that some of your inner characteristics match with his conscious or unconscious "ideal".
3. Oppositions are usually good in synastry unless they involve "malefics" (Mars, Saturn) and the outer planets (Neptune, Uranus and Pluto). I think the orb is too wide for your Suns to be opposite, so I wouldn't count it. Venus opposite Venus by itself doesn't create much attraction, because Venus is yin energy - "receptive". It would probably create some discord in your love styles, however it's not a very negative aspect and finding common ground should be possible.
4. Orbs are important. I can see that your Moon in Scorpio is at 9°, which is in exact trine to his Venus in Pisces, at 9°. This is very good for compatibility. It should create a very comfortable, easy-going energy between you. You just feel good around each other. Again, by itself, it doesn't create crazy attraction but a lovely feeling of togetherness.
If you want to see physical chemistry, look at what Mars does, if there's Pluto contacts and ASC contacts.
For a serious relationship, look at flowing Saturn aspects (hard aspects to Saturn often create difficulty but can be binding).