Wish you luck with your journey. I do think that learning and growing with your horse is extremely rewarding. I learned the most when I started breaking my current Gelding.
I don't exactly know where the offence has been committed here though, I see lots of helpful advice. I've been riding since I could walk and am finding out I don't know near the amount I should. Reading many threads on this forum has helped me so much, showed me techniques I hadn't thought of, and health practices I didn't really know about or were as important as they are.
I don't think the idea of getting a trainer is something to be hurt about. I am trying to save up a bit to go ride with one soon, there's always something to learn and work on. Be it fine tuning, working on balance, or just plain old timing.
Ultimately it's your decision to go it your way or use a trainer's help. These suggestions here are not "YOU HAVE TO DO IT THIS WAY!" But are advice coming from people who have found this path helpful.
Again, wishing you luck with your new filly!
Duggan & Miss May