Hairspring end got out of where ever it was tangled, easily didn't it? Imagine or try doing this with the stud attached.
Where it still can use more sorting out is easier to identify from the picture, Picture of a new hairspring makes a good model.
I would rest for a while, let your mind come back to this naturally, before your second attack, one or two more attempts and you are very likely to have a near perfect coil.
Sort out as if you are sculpturing.
There is no secrete place for spare parts. What we can find on the internet, you can too. In many cases people uses donor movmment or complete watches. Beside, I never seen individual Seiko plated jewels for sale.
BTW, we have a section here where it's considered polite for new members to introduce themselves.
When cleaning the movement, I put just the balance back on the mainplate, then get a line of sight down the centre of the escape wheel/pallet jewels and between the banking pins to the impulse jewel. If not central, rotate the balance and make a mark opposite the stud.
You can do it with the movement assembled, but I find it easier with a bare movement and no pallet.
I can usually get to about 1 m/s just by sight. Which is good enough without an adjuster - I think people worry too much about a bit of beat error. As @clockboy says above, things can easily go horribly wrong.