Neptune and Jupiter in Capricorn in the 6th(Daily routines, wriitng, natural house of Mercury along with 3) -
I think you have the potential for a refined, intuitive understanding of structure and ambition of a novel. Neptune and Jupiter also
have spiritual themes but I'm not sure how this would fit or if it would have to.
The presence of them in the 6th suggests you can make daily writing pleasurable rather than arduous.
With Uranus right at the start of Aquarius in the 6th, scientific themes and originality in daily writing are likely.
Saturn right at the start of Aries in the 9th, with Aries south Node in the 9th, suggests that you can acquire over time a high understanding through the self, personal experience,[and also of publishing-the Saturn suggests you will not live in cloud cuckoo land about getting published-you are a realist, and at 0 Aries you can win but not without a delay-however, the North node is the house you really aiming for] that with the North Node in Libra in the 3rd, which can be projected onto another(Libra), or the public, or the universal experience, and made tangible with details(3rd house) and not just abstractions(9th)-ie autobiographical, or semi-authobiographical writing, projected onto another or other characters.
Irvine Welsh has these nodes, albeit the signs are flipped, with Aries in the 3rd- but the projection theme still applies.
Maybe browse what he did to get a better idea of what I mean here...?
Finally I'd say the mercury in Sagittarius in the 5th is very significant, it would give the ability to be creatively risk taking and pioneering, but at the same time do the daily work on detail. It gives the potential for surreal and/or comedic writing, or just conceptually 'out there', original, creative writing. I have seen a Sag 5th house often in the greatest artistic mavericks, Dali, Miro etc, so with mercury there there it is very promising. Think the literary equivalent of these unconventional artists that broke the mould.
It's be very useful if you could produce the part of fortune on the chart as well.
I enjoyed that, interesting stuff.