I was in the CF in a trade I didn't like (albeit briefly) that I never should have included in my application, but I was naive and took what I was offered.
I lucked out when I released and later reapplied, this time for ACSO via ROTP, I got my top trade. That being said, it is high risk/high reward to release and hope to get back in, especially with the recent reduction in ROTP recruiting (roughly 30% from last year to this year according to numbers provided to me by my file manager).
Spend the weekend reading/asking/studying about Artillery and decide if that's a career you want. You should come up with either A) yes B) no C) not sure. The answer is clear, for this year at least, if your answer is A) or B). If your answer is C), best of luck- no one can make that choice but you.
You don't want to be miserable, even if the money is pretty good, but you also might not be miserable. You didn't say you DON'T want Artillery, just that you prefer other trades. Now is the time to decide if you want Artillery.
EDIT: No need to quote the post above mine, thus removed. Also, I agree with Michael O'Leary.