[deleted OP quote by request - Moderator]
Wow you got a lot of water. Especially with stuff domicile in water (Cancer moon, Pisces Jupiter, Scorpio Pluto) that strengthens this a lot.
I would try to focus on fire like you said good idea. Also have you tried themes and colors related to fire. I think water is opposite fire this can create a balance and help you a lot some meditations on invoking fire might help you. There are various websites and meditations on that look it up and find one that you feel is good for you. You can be very intense and deep you need an outlet or someone who can understand you. Spiritual or artistic groups might help or a cause you like. Listen to music and walk in nature also it's important not to be around too many negative people as you may absorb their energy negatively affecting yourself.
As well as focusing on North node you could focus on the areas of life your Saturn and Uranus rule this could help with more fire like traits. Try to gather positive Sagittarius traits and work on your Saturn lesson.