Correction period

I'm considering orthodontic treatment because my minor teeth are quite prominent.

How long does it usually take to get orthodontic treatment?

Is it true that starting orthodontic treatment causes tooth pain and makes it hard to eat properly?

I usually talk a lot, but I'm worried it might become uncomfortable.

The price also varies greatly, so it's okay to just go with iron, right?

Please advise me on how to find out about hospitals.